Simple, I'm on Mastodon, Substack, Threads and Bluesky.

And they are all barely breathing.

The community density is low (because of the split), the discovery sucks (because of decentralization and no algo to suggest content), the culture is homogeneous (I encounter people mostly from one political side) and the publication of limited quality.

You can't start new communities from old users. Communities are built by the young, they are the ones with the creativity, motivation and free time to do it.

That's why twitter, made mostly by young people from 20 years ago, still got the inertia of it, are is more interesting and active.

And that's why tik tok and roblox are full of life. I'm sure the kids are also elsewhere, where we are not looking, creating the communities of tomorrow.