Used it once or twice then stopped, prefer raw lxc or even just manually creating namespaces if I want control.
Never quite understood the point, the additional polish seemed fairly minimal from a utility pov.
They should take over proxmox or something, give themselves a complete story.
Cloud systems invented this concept called 'declarative environments' basically you describe the software in a container or os and the container orchestrator builds it for you. The same every time, you just give it a recipe.
Nixos is that for desktops.
It takes away a lot of the bullshit, experimentation and breaking of a classic os.
That being said, I always considered that the fun part, so ymmv.
It's like docker for server applications, it takes care of everything for you behind the scenes and just works (ish).
Love kde, but it needs to get that bloat down. Still snappy though.