Most lemmy apps do not embed videos/gifs and have to open them on the in-app browser. The only ones I know that can do it are Arctic and Avelon, of which the latter put scrubbing behind a paid subscription. So Arctic is one of my top lemmy apps, even though Thunder is my favorite for general browsing.

Another minor issue for me is almost every app tries to look like Apollo, so they end up all looking the same. It’s one of the reasons I like Thunder because it looks a little different.