I mostly like Cosmic. One annoying thing is that Cosmic Media Player plays all videos muted by default. It is quite annoying to have to unmute everything.

Cosmic is really solid, I ended up switching to Niri/DMS and prefer it for a number of reasons but this is probably one of the best DEs nonetheless and the only that does a good job with both tiling and stacking WM

Cosmic is really good. But whenever they integrate Nightshift (or the like), then it will be great.

Decent updates but still lacks a lot of small polish. One thing that annoys me is the mouse cursor. I wish it would disappear when typing or idle.