2000 was meant for businesses, not the consumer and it worked brilliantly for that. As a matter of fact you'll find zero businesses running xp but even in this day and age a few still run 2000 based systems.
Most seem to run XP? I've seen a couple who were fooled into running Vista (well they purchased the machines and had little choice) but I see very few on 2000/7 these days.
Although personally I think 2000 was the last *good* OS they released, and it's been downhill from there, slick, powerful, well organized, stable, intuitive with no gimmicks.
W8 is a joke, Metro might be acceptable if it was a frontend you could launch for some specific apps, but putting it as the default interface (when as an OS interface it's useless) with what should be the primary desktop 'bolted on' and stripped of a fair bit of it's power and key functions (start menu) just feels wrong.
People tend to hate change because most change is not for the better, it's often to sell new versions or because people also assume things which aren't changing are dead, also a fair amount of the change is politically motivated, try to get everybody to buy apps through a Microsoft store, use patented interface designs so nobody can copy them in an attempt to provide a familiar interface elsewhere (software lock-in) or to make extra money by showing you more ads (the 360 dashboard based on the same tech..)
None of the interface changes in Win 8 make it a better OS, they just make it more inconvenient when you want to do power tasks, metro apps are full-screen only? I spend most of my time on the PC with multiple windows open, sized how i want them, so I can monitor stuff and Microsoft are saying the future is full-screen apps? That's... madness, it's almost like being back on DOS.
It's scary to think they probably actually want to drop the desktop completely (why else would they have shunned it into a corner and ripped out key parts?)
People just end up accepting change, because eventually they're left with no real choice in the matter, both hardware and software support for legacy systems vanishes, or in the case of online applications, the old versions simply don't exist anymore.