I switched from Arch to NixOS and I know many others who did too. For users inclined to use a distro such as Arch, NixOS feels like the natural next step.
I’ve had to do very, very little to my Artix desktop since setting it up that I don’t think I’ll ever switch unless my life constraints changed significantly. NixOS seems like a lot to learn. I’m happy to be proven otherwise and know I’m not alone in becoming very complacent to my setup once getting to Arch.