Comment by PaulDavisThe1st

Windows NT is younger than Unix. I'd say the smart money is on the Unix-derived line of operating systems outliving Windows NT by a considerable amount.

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.