Although, I'm sure MS don't agree
I think they are stuck with the mentality from the beginning of the Computing Era, that since there isn't alot of software the OS has to provide all usability...
Come on, you remember the days when they had computers that had builtin programs... MS have just made one amemdment to this philosophy, there version is better and should be the one used... I'm waiting for them to integrate Office suite into Windows. I guess though with the legal actions that have been taken against them, they'll have to "hide" it.