I recently experienced some hardware unpleasantness and have just upgraded my main desktop. I've run Windows on my DIY custom built desktops for about the last

I recently experienced some hardware unpleasantness and have just upgraded my main desktop. I've run Windows on my DIY custom built desktops for about the last ten years (much of that time has been using XP). What have I just bought to replace my dead desktop? A Mac Pro. I won't be going back. As a counterpoint, I have a friend who's done .Net based web development for some years. I couldn't convince him to dump it and join me in open source land, but he is just starting to get into .Net MVC. He has purchased a new high end Dell laptop that he will run Windows 7 on and this will be his main machine. He won't be moving from Windows any time soon, likely never. He says he's invested too much time in .Net. It's what he's comfortable with and that pretty much trumps anything else for him.