This is exactly why I run Kubuntu. People that say "I love Mac" typically aren't the type to dig deep into their computers. Perfect for them but I do some light developer work and other things that require me to dig deeper. My wife has Kubuntu installed on her computer as well. She can do all the stuff she did on her Win XP machine and it runs so much smoother and faster. As before with virus prone Windows, I am her IT guy, but a much happier one because it has been a problem free two years since I installed Kubuntu where with Windows it was every six months I was spending an entire evening trying to fix something.
I don't know what the numbers are today but a few years ago there were as many people running Linux desktops in the world as there are Mac desktop users.
My company issued laptop is running Windows 7 and while I find it to be an upgrade from XP, there are still many glitches that I find annoying. Crazy that a company can charge for software that doesn't really work that well. Unfortunately I run about 20 different pieces of native Windows software on it so I must stay with the OS.