For me, walking through an old Souq gives me a similar feeling of awe / mortality / insignificance as viewing a cathedral or looking from the Colorado ranch land up to the Rocky Mountains.
Also some cathedrals have remained "Catholic" since their raising, but there are a lot that have changed from Christian to Islamic to Protestant ... both the cathedral and the bazaar's physical buildings are still present from the same era and both are used for their original purpose (marketplace or worship). And both have delibly shaped their regions by being engines of culture, innovation, and power.
However ... the domain of operating systems is subject to weird constraints, and so it's not really appropriate to make some of the observations one might make in other domains. Nevertheless, I thought the point was that we want things to improve via replacement (a "bazaar" model), rather than stand for all time. We don't actually want technology "cathedrals" at all, even if we do appreciate architectural ones.
Are you referring to the *BSDs? Linux isn't Unix derived. It's a re-implementation with no code traceable back to the original Unix or any of its descendants.
Aside from that, Windows has a revenue stream behind it that looks to continue indefinitely paying for its development and Linux has...? The half-digested carcass of Red Hat within IBM? Canonical?
Linux is the root OS of Android, which has a lot more revenue behind it than Red Hat or Canonical.
It's no longer a bazzar where random university lecturers write and run entire subsystems between classes, but it is at least multiple companies contributing.
Windows NT will be with us longer than systemd and flatpak.