I'm trying to understand the way Mastodon works. Back in the day I started with IRC and then the many php-based forums and then reddit which led to lemmy. I never used twitter or similar platforms.
My understanding (and this is where I need help) is that all of the above are topic-based, whereas Mastodon is person-based? What I mean is that on lemmy I subscribe to things based on topic and I don't really care about usernames or user profiles, I only care about discussing a topic. It seems to me like Mastodon is the opposite? You follow persons and what they might say about any topic?
Is there something I'm missing here? Are hashtags close enough to sorting it by topic that it works just like a topic based platform? Is this difference inherent or just in my head because I don't understand Mastodon?

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[–] DarkThoughts@fedia.io 6 points 1 week ago

Yes, Twitter, Mastodon, Bluesky and all its other niche platforms are very much person based. They can still be topical, based on who that person is and what they post, but they have this self-centered drive that never made me click with any of them. Hashtags help with discovery since you can search and even subscribe / follow certain hashtags, or use them to block / filter certain topics. But there's also often people who abuse that and just spam hashtags, or people who don't tag their posts properly, which makes it a very flawed system imo.

Forums, Reddit, Lemmy, mbin (excluding the microblogging section), etc. are all topic based, and users are just contributing to those topics but ultimately not important as the person. That being said, some also allow you to follow the people directly as well, but at least for me that's never been much of a thing.