Comment by kixiQu

Plenty of problems are solved. They may not be ones you care about, but they're not "really none". Anecdotally, the instances I know of take a much harder line on moderation of transphobic content than does mainstream social media, which is something desired by some communities and made possible by heterogeneous moderation policies; "no ads" is a problem solved in of itself; no QTs gets rid of about 70% of the "dunking on this bad take" posts relative to Twitter; lower stakes discoverability means people express themselves differently; content warnings make your feed more manageable; etc. etc.