Additionally, you end up with crap like Noise (a Signal fork that uses the main servers) where features inconsistently work or are available and the devs of Noi

Additionally, you end up with crap like Noise (a Signal fork that uses the main servers) where features inconsistently work or are available and the devs of Noise don't actually pull down new code very often, resulting in a two tiered network that has many unreliably working features. Hence why Moxie doesn't think federation is practical with an evolving communications protocol.