Decentralisation could very well lead to specialised instances for niche interests or fringe groups. I mean, exactly this has popped up during the first two Twitter migration wave.

And still, you’ve got countless people who want mastodon.social to be exactly the way they want it to be, regardless of what anyone else may want, or what’s possible on such a big instance. Because that’s where they are, and they are not going to move elsewhere.