Pop!_OS is going to stand out with this new desktop environment. System76 is clearly giving it enough attention to make it as good or better than other Linux desktop environments.
I'd recommend everyone to try out cosmic-store (with cosmic-icons) when they get a chance. Whether you use COSMIC or not, it's fully functional with any desktop environment. It's packaged by default in Pop!_OS 22.04, available in Fedora 40 via ryanabx/cosmic-epoch, and the AUR.
I've been using COSMIC for a while now without problems, and the store is great. Easy to theme and the apps are pretty good. I haven't checked it lately, but I hope the greeter improves soon.