Putting my own personal bias into it, attitudes like Sven's ... are what I see as the big impediment towards adoption of open source.

What I see is part of the beauty of open source. (OK sometimes there is a bit of - shall we say - attitude. Prime example: mplayer.) But what I'm talking about here is freedom - specifically freedom of speech.

Sven has a great point and he can make his point without worrying about customers the way a developer would working on a commercial product. Boing, I do see your point and it is somewhat valid but please understand that this freedom of the open source developer is a strength not a weakness for OS.

In the link you provided, The Gimp is compared to Star Office which is all in one window. But they've fixed that problem now in open office so that it is in multiple windows. I really don't see how a one window gimp would be an improvement but if you do (or any others) you are free to fork the project and implement that. Or simply do this command:

gdmflexiserver --xnest