Expect some of the following to happen in the coming weeks:
- celebrities with huge follower counts pushing tiny community-run servers to their knees
- instance admin burnout; shutting down of servers
- big new servers that don't "vibe" with common rules or culture being widely defederated
- some notable account violating an instance code of conduct and throwing a fit
- lots of people ragequitting Mastodon for one reason or another
- etc.
It'll be a rough ride. Patience and strength, all.