I'm pretty excited about #Spritely Crystal. I guess it'll be clearer what it is once it's available but it shows off that mutable, peer-to-peer, server-failure-friendly, and securely private updates are possible in something like the fediverse.
It also exposes a whole lot of problems about the possibility of conflicting updates. But as Crystal will make clear (if not crystal clear, ha), those problems *already exist* on our current fediverse, and are mathematically hard to remove. Embrace it!