> TikTok does this pretty well but it is also pathologically good at picking new things based on your viewing habits. It has a huge advantage over Threads (and Facebook, Instagram, X, etc) in that TikTok only presents one thing at a time to the user.

I'm glad someone else gets this. Fundamentally, TikTok are solving a much, much easier ML problem than FB/IG/Twitter et al. They can classify every post you see much more easily than the others.

This is presumably (maybe) because they were built as products with ML in mind, rather than having it tacked on at the end.