Operating System Stats

Some of dannychoo.com's OS stats taken from the latest log of 18,000 entries.
LOL at MS's attempt to get users to upgrade to Vista.
I got rid of my last physical Windows machine last week-ish and am now emulating Windows in my Macs for QA purposes.
When I was using Windows however, I didnt see any need to upgrade to Vista at all - XP worked just fine.

I used Tiger for quite a while even though Leopard was out for a while - reason was that the Apache, PHP and MYSQL settings were different and an upgrade would have broke my dev environment which I didn't have time to fix back then. Am using Leopard now though and the upgrade is most certainly worth it.

Anybody here cant be bothered to upgrade their OS - and if so why?

OS girl image from Gelbooru.