I’ve bounced around alot, have numerous distributions on my Proxmox Hypervisor, but my favorite daily driver, for a really old computer, is ( MX Linux ) I’ve twice tried other distros to see if I could improve upon the stability and performance, as well as the very convenient availability of a feature rich KDE Desktop environment, and I came back to MX twice now. When I get a new fast computer, I’ll switch to Qubes OS, for it’s built-in hypervisor and security/privacy and isolation features, but until then, I’ll stick with MX.
IMHO, there are excellent reasons why MX ranks highest. I think it’s original roots in AntiX with the elimination of systemd has afforded it a substantial advantage over stock-standard Debian, my last daily driver which always had performance issues. With MX, on same hardware, system lock ups are far less frequent when the system is overtaxed.