More UX than UI. The entire on-boarding process is hard on Mastodon. Who is on there? How do we find them, etc. it’s all rather nebulous. BlueSky has been innovative with some of their ideas. Things like starter packs are simple but greatly help new users get going. It’s shocking other social networks have not thought of them.
Apparently not nearly as many people as those who prefer Bluesky’s approach.
Most new users want to easily see feeds related to the things they’re into and that’s objectively more difficult with Mastodon unless you already have a list of accounts to follow. I want Mastodon to succeed and grow but it won’t if it only caters to tech heads.