I've used Arch for about 10 years now, and I haven't done a reinstall ever. I've moved to new hardware (laptops and servers) several times over the years, so I've done fresh installs on the new hardware. Does that count?
> a system that requires regular reinstalls to be usable/stable.
Windows 95, 98 and XP were like that, no? Those have been the standard business operating system over the years.