I came across a video about this, and I thought the interface looked unique. There are some rough spots, and I’d prefer if the spacing was even tighter, but I like it otherwise.
I’m not familiar with Linux theming / customization at this level, so I can’t comment on it past that. The repo link below has the video:
https://github.com/caelestia-dots/shell
Some more screenshots:
Niri does look nice, that’s the one I want to try someday.
Back when I first started using Linux, I had some issues after trying to customize things (ex. Being locked out of the plasma desktop), and it scared me away from any big changes on my main device. I might take another whack at it now that it’s been a few years