Full keyboard navigation (j and k to focus up and down posts, u to go to user profile, c to enter comments…) including toggling expandos, and regex keyword filtering for me.
Have you checked out kbin? It has some of those features, and you can sub to lemmy communities with it. It also allows you to follow users, which lemmy doesn't seem to do. But you can't save posts at kbin, which is something I use a lot.
Edit: literally just discovered you can save comments and posts, at least here. I don't know if that's new or if I missed it somehow.
so lemmy web does have colored children, are you not seeing them?
Infinite scroll is in progress https://github.com/LemmyNet/lemmy-ui/issues/878, though the devs are against it and I agree with them, however they tend to be pretty chill about other users adding things if they are off by default.
I love that theyre thinking about calling out research pointing to it being potentially harmful to mental health rather then refusing to implement it or implementing it without thought