I initially saw a lot of buzz about moving to Telegram, but Telegram is a secondary platform
at best; there's no way it can viably take place of Twitter in its current format. What will most likely happen in this scenario, like
@The Big O suggests, is that they retreat back to their niche sites like FurAffinity (lol, lmao), some of the more tech-oriented furfags may try (and fail) to create a Fedi platform via Soapbox, others may shit up smaller art sites like Weasyl instead if the FA autism is too toxic.
What a lot of people don't seem to realize about Furry Twitter is that it's given the fandom and the artists within it a degree of visibility and communication that they simply were not getting on a major platform prior to 2016 or so, and when Tumblr got (perhaps deservedly) neutered in 2018, the floodgates opened for big artists in the fandom to get even bigger on Twitter. There are artists in the fandom that have follow counts that rival journalists and politicians, and from what I can tell, those counts are probably more genuine than the bot-riddled aforementioned, and I don't know who that reflects more poorly on, but I digress.
Furries are
shit-scared of facing the prospect of migrating again because they got real comfy on Twitter, which I think has been exacerbated in ways that it wasn't on Tumblr by having a UI optimized for normies and visible follow counts/metrics, the latter of which drives many popular users to obsession even if they aren't always conscious of it. They don't want the 10k follow count they earned(?) from drawing obscenely buff wolf men shitting dick nipples to go up in smoke overnight.