I'm running Fedora 40 Atomic Budgie on a little micro desktop for fun right now. IMO, it's not quite ready for prime time just yet. I do appreciate the simple ability to roll back at boot if something does go wrong. I've done it once after an update and it was nice. The next day a new update was pushed to fix the error in the update and on I went on my merry way.

On the other hand, there is a general sluggishness and a feeling of malaise to the system as time goes on. It's not a show stopper. But it does not spark joy either. Budgie ran a whole lot faster and smoother as a "standard" install. And I'm not installing a lot of extra software and they are all installed as Flatpaks or I have 3 pieces installed as appImages. So it's all just updates.

The real test will come when Fedora shifts from 40 to 41 and I upgrade the distro. Will it be as "immutable" as they brag about.