As far as saving to plain text and copying plain text, those are two different things. Forcing someone to save a file and open it in another application just to paste the text is just plain terrible. I've never had that happen to me though, so maybe he's doing something wrong.
I find Word very frustrating to use. I don't feel like I'm using it, I feel like I'm tricking it and at any moment my text will simply change fonts or tab depth or something weird.