Linux pays attention to upper and lower case. "Documents" is not the same as
"documents". It also has an aversion to upper case for some things, such as
computer names and wireless SSIDs.

The big factor is applications. I have a friend who maintains a huge web site in
Front Page, and he's really screwed: he can't switch to Linux, and Microsoft
dropped Front Page as a product several years ago. He says FP won't run in
64-bit Windows. He also does video editing, and all the latest Windows video
editing programs require 64-bit Windows.

If you are a Photoshop power-user, you are probably stuck with Windows. A
program called GIMP does all the photo editing I need, but I recognize that
Photoshop can do more.

Windows tends to slow down because of the buildup of temp files, and the
registry becoming immense. Linux has no registry.