Here is an interesting post on why we all should be using text files and light markup rather than a proprietary format.
Some of the comments are amazing. Take this: "When I made the move over to Mac after years of Windows, I started to crave systems like this. I find it funny how a lot of people who think they have a list of things not to like about the Mac always manage to include the fact that 'everything is just designed to look pretty and not actually do anything productive', when in actual fact, quite the opposite can also be true."
Now, remember this is about the use of text files. Doesn't this person know that you can use text files (and a markup language) in windows just as well as on the Mac?