Lemmy has naturally become the unofficial home of furries and trans. I love it and am happy to be here for it before it goes mainstream and gets enshitified. We're living tomorrow's good ole days and don't even know it.
It's not being mainstream that causes enshittification by itself, it's corporate control.
That's the beauty of federation, there is no easy way for a single entity to become dominant.
I'm not saying it's impossible for the fediverse to enshittify, but it seems to me that it probably won't. We've already shown that we're resistant to corporate "embrace, extend, extinguish" strategies.