I tried this out for fun a few releases ago. It was a mess. I've kind of lost track on why this is even a thing anymore, but anyone involved want to weigh in?
My experiences with pop haven't been amazing (just always ran into small quirks and issues that shouldnt be a thing, but I haven't messed with it all that much), but I'm pretty happy for there to be another big polished desktop environment with resources behind it, I think it makes the linux ecosystem better :)
Its written in Rust, is a completely new code base so not held back by tech debt, and is a clean DE while still being fairly customizable even now.
I personally don't care why system76 felt the need to code a new DE from scratch, Im just glad they did it. It has given us a whole new ecosystem of GUI toolkits, apps, etc. for linux written in Rust.