All the poor artists and creators on Twitter.
Prior to today, you could opt out of having your posts used for AI / generative training. The new amended terms and conditions have made it impossible to do so.
Will this artist exodus make Blue$kkky better? probably not but it would be funny if it did
There can be no valid alternative to Twitter because the Twitter format is fundamentally bad and always has been. It's just more obvious now with Elon heightening all its flaws but the unthreaded broadcast microblog with realnameposting was always a bad idea.