not enough of my niche interests from reddit moved here. also the sports communities are a little bit like ghost towns

Lemmy devs - they are a curse and a blessing. A blessing that they worked on lemmy before reddit exodus. A curse as it's hard to contribute to the codebase and related components.

At least we have mbin and piefed to federate with.

Also in the 2 years since, the culture has shifted. There is less: "This is a new place. let's make it enjoyable for everyone" and more "I am right, everyone is wrong, and I will ruin your day", but that could be just my perception and not enough blocking.

lack of communities, not found on lemmy, but is active on reddit. even some mirrors are rarely have new posts. more pros than cons though.

The tankies are far and away the largest problem. It's the number one reason why lemmy hasn't grown. Even when I signed up years ago from the reddit exodus every post I saw was heavily cautioned with "it's filled with tankies". And now every mention of it is being scrubbed for that reason. The second problem is the smaller size but see reason 1 for that.

Third problem is the sign up process being so excruciating. I understand it's to prevent bots but for every 2 bots it's preventing it's probably also preventing 1 actual user from signing up. I love this place despite the small size, because I can just sequester off all the tankies entirely on Connect, but if the creators don't realize they're actively standing in the way of growth by the actions they're taking and step away from all their moderation actions to focus on administration and development instead the outlook doesn't look too great.

The tankies

Smaller user base. It is both good and bad but the community for my city is dead (probably there were only like 8 of us on here).

Am old enough to know from experience that the early people on any platform are the computer geeks so expect the tech communities to thrive first - but as someone else said, music communities die, sports, arts, things that are pretty widely popular. Honestly happy with the slow and steady growth of the !cocktails@lemmy.world so if it's an indicator, the general interest people are joining just not quickly but some must be sticking. I would guess at some point it will be perfect then too big but who knows?

Personally I also miss the nonsexual nudes threads like nakedprogress and normalnudes. Again that's a lack of users issue, you need a lot of people willing to post, to have even a few willing to post nude.

I have trouble finding um what are they called here... Communities?... for the subjects I'm interested in. When I search, all I find is old posts or unrelated posts.

That's my biggest problem

Duplicated fragmentation

Not enough people for even slightly niche communities. Wanna talk about smash brothers ? 732 people, only 2 posts in the last month.

This is why people still use reddit on the side.

As everyone has pointed out, people and content. Its good in some ways since not every post is drowned out with one thousand replies nobody will ever see, but at the same time, you're not getting much of anything at all sometimes. Not even very niche ones either. Even groups that represent entire states has limited info or replies still. If it can grow to that size and see some more unique and local content more I think even that would be a much better place for it to be.

Duplicate communities posting the same content over and over again.

Communities are tied to an instance. How many communities will die because lemm.ee is shutting down? There is a slightly mad rush to migrate communities already.

Lemmy should have used usent style naming for communities.

Same as with every other social media ... the people.

lemmy.ml and its admins being the developers at the same time.

The negatives of a social site combined with the negatives of an unpopular social site.

The lemmy.ml instance not being treated the same as the rest of the Triad in regards to defederation

Some highlights from the link:

"Don't worry guys, the Uyghur Genocide was REALLY just birth control! ~dessalines, .ml admin, dev https://lemmy.world/post/30580167

"See! nobody died IN Tiananmen Square, just AROUND it, so it doesn't count!!" ~ Davel, .ml admin https://lemmy.world/post/30673342

.ml admin, Nutomics continued transphobia https://lemmy.world/post/29222558

CW: Original transphobic Comment from Nutomic

"NK is actually good and anything counter to that is Western propaganda!" ~dessalines, .ml admin, dev https://lemmy.world/post/31595035

General negative sentiment to other instances who haven't "seen the way" yet ~davel, .ml admin https://lemmy.world/post/27426510

"If you don't support Russia then you just don't understand geopolitics" ~dessalines, .ml admin, dev https://lemmy.world/post/27352415

And a long list of bans/censorship and allowing the proliferation of known propaganda and misinformation outlets clearly demonstrating use of their instance and recognition to force a political narrative

Niche communities. Large spaces are built of small niche interest groups. The tooling around small spaces needs to be first class if we want the larger space to be healthy

Issues that would be solved by time/gaining more users

• Not nearly enough people to cover all the niche interest communities that Reddit does. At Reddit you find an expert on almost any topic to help you with your problems and you'll find information on pretty much anything. Lemmy isn't there yet.
• Not nearly enough history. A lot of content is still good and informative after many years. Lemmy doesn't have a library of old-but-still-relevant content to search.

Issues independent of user count

• Search sucks. Reddit's search does too, but reddit is easily searchable via Google. Lemmy isn't.
• Onboarding is difficult, because you have to choose an instance, which is hugely important, but a newcomer has no idea what makes/is a good community to join

Issues that get worse with more users (aka, the potentially deal-breaking issues)

• Lemmy scales terribly. Every larger instance needs to retain a copy of pretty much all other content out there, and each comment/like/delete/update/... needs to be propagated to every other major instance out there. Adding more instances thus increases complexity and cost instead of decreasing it. Running a major lemmy instance is already prohibitively expensive now, with just about 50k monthly active users. If Lemmy was to scale to Reddit numbers (1.1 billion monthly active users, roughly 22 000x the number of users), everything would just break down.
• Moderation work scales just as terribly. Not only does an admin need to make sure the communities on their instance are moderated, but they also need to moderate all other communities on all other instances.
• Related to the last point, there's some legal issues as well if an admin doesn't moderate all other instances. Since content is copied from other instances to your instance, illegal content (e.g. illegal pornography, copyrighted works, ...) are also copied to your own server without your active participation. That makes it legally mandatory to moderate all other communities.
• Legal pitfalls in general. If lemmy becomes sizeable enough, all sorts of laws in regards to social media platforms will apply. That's one thing if the social media platform is run by a huge corporation with a legal department, but it's an entirely different story for a tiny group of non-profit idealists running the social media platform.