I was just wondering why there isn't more popularity for fixed-positioning backgrounds? It seems like an easy fix to have a set image as your background. That way, designers and developers don't have to worry about such headaches as background-repeat.

This way, it's easier to have a photograph as your background.

I realize that it's not good web practice, but why don't more people (especially inexperienced/untalented web designers) use it as a quick fix?