Im joining in on the reddit ditching thing, and was kinda worried at first that i wouldnt be able to like use it the way i did reddit as it feels like a whole new place, but after engaging with posts and people and actually being a part of lemmy rather than being lurk mode all the time i was pleasantly surprised with how easy it is to become a member of the community, theres a reasonable amount of subs (or whatever the other word for em is) that fit my interests, enough linux content and shitposting for my liking, and the overall random posts made by people equally fed up with Leddit. (also i admit i used reddit a little cus there was this post on the fedora sub showing how to fix a sound issue i been having after a recent update)
I love that I'm actually using essentially a protocol, instead of a corporate service. The discussion here is good, there is a lot of interest in the "old web" which I'm fascinated in, and the place has just enough users to feel comfy and not absolutely chaotic. It's awesome.
Reddit really started as a "Oh cool, just a couple dudes running this, not like a big corporation" and proved that even then eventually it'll all end up the same way. Here we are now, on a new platform that literally can't switch to that direction. I'm loving it
I feel like mega-instances could kinda do that. Not to the same extent. But imgaine if there's three or so servers with 90% of the users, and they decide to start de-federating from everyone else. Or selectively doing so.