I think he's talking about similar communities from different instances. Like "books" on lemmy.world is separate from "books" on lemmy.ml. So people will end up migrating to the larger one for more users to share with. I feel like it's not a big deal since I can subscribe to all of them while being on a single instance.

[–] JackbyDev@programming.dev 2 points 10 months ago

I know you agreed with me so don't take it as arguing, but I don't get this logic. If someone made "books" there's nothing stopping people from making "readingbooks" with the exact same rules and content guidelines. The problem doesn't go away.