People have long since using computers for the sake of the OS (well, except for OSS zealots).
Uh-huh. Tell that to Solaris admins, who believe Sun's platform is the best for high-demand servers. Or to people doing heavy-duty scientific work that buy SGI machines so they can run IRIX and do seamless clustering with ease. Or "OSS zealots" who prefer an OS that they can be free to tinker with and improve.

Your stereotyping of people having a preference in the OS they use as "zealots" is childish and myopic.