The old MacOSes are good until 2038 (don't ask, it's a byte-size issue) and everything since OS 9 is gold until something like 5000 or something ridiculous. See, Apple hires competent programmers.
Us Mac people don't get to enjoy the virus/spyware tomfoolery either.
Also: you did the apocalypse right, man!
(I was 16 in 2000) OMGLOL!