Maybe Bluesky has "won"

It's early days, I think.

So far I see good sides of both Threads and Blue Sky. Threads has a lot more users, but I see more 'subject matter expert' kinds of people on Blue Sky as well as smaller more intimate communities. But we'll see what happens if that dynamic attracts more people and it stops being quite so cozy.

Threads seems unusable unless they change the algorithm. It defaults to For You and For You is 50% Instagram-style engagement bait, 50% people you've never heard of complaining about things you've never heard of, and 0% people you're actually following.

If they fix that it could indeed be quite good, but it still feels too much like "broadcasting" vs "conversation", and I'm personally not ready to be popular like that.

Bluesky does have a little toxic positivity but it's much better, and it's possible to chat with friends on it. (When I try enabling the algorithm features they still won't stop showing me gay porn though.)

If you follow and engage with enough people, the engagement bait stuff goes away, for the most part.