Re: Beg to differ
I always assumed it was just that most people historically didn't give a shit about computers. Windows won the workplace and because they had one at work, they got one at home.
Possibly less true now than it was 15 years ago, but there's still got to be a shit-ton of older people who are only using Windows because it's what they were forced to use the first time out and never cared enough to switch.
I'm comfortably OS agnostic since my first computer was a Vic20, when I was at high school it was all Acorn RISC machines, a brief flirtation with iMacs (the CRT ones) at college, and then it's been Windows everywhere I've worked from then on. My desktop now runs Debian, but then I'm a sysadmin, so hardly typical.
If you didn't grow up through all that and your first exposure to personal computing was at work some time in the Win 9x era - which a quick staff room, coffee break, chat around here seems to suggest a lot of people's was - then why would you know or care about your OS? You just go with the "brand" that you've heard of and are unlikely to change unless forced to.