A huge mistake the fediverse makes is large instances. It's resource intensive, expensive, and creates wildly large failures instead of little ones.
This is why I'm sad to lose the bots, but also glad botsin.space is going away. BIS was always weird, a place to place bots which cost a lot, but wasn't a community. Bots should live alongside their makers or users (or just have a way of posting without needing a full server).