Only when there is a real need . Debian runs on everything and it is a no nonsense distro so I've been happy with that for years... Started on Debian 6 and continued until now on laptops servers and SBCs. Before that it was Ubuntu and crunchbang for a few years and before that was fedora core that came on like 6 cds with KDE3.

At this point the only interesting thing for me are security changes. Games are largely sorted due to wine , proton and vulkan and all of the great work going on there.

I keep and eye on quebesOS , NixOS, silverblue ,subgraphOS and openBSD and alpine.

The dream OS would be hardened by default. Hardened Kernel with ACLs for everything defined by default. Like each app should be required to list all of the files it accessed and the type of access in a manifest, list permissions it needs and of URLs it accesses. Obviously there is a need for some wildcard stuff but it could be limited in scope. More of the kernel in rust would be nice with legacy systems removed to reduce the technical debt.

I know we have apparmor and selinux and pax/grsec (if you pay) but I think they dont scale well and require a massive investment in time to understand and debug.