I think having choice of desktop environment is a good thing. However, I do think he has some point on interoperability. Copy/paste for example, works differen

I think having choice of desktop environment is a good thing. However, I do think he has some point on interoperability. Copy/paste for example, works differently in desktop apps vs terminals, etc. File selectors is another thing. I like the KDE one and the file selector is the reason I ditch gnome altogether, but best would be if KDE programs used gnome file dialog when running gnome, and if gtk programmes used KDE for dialogue of user ran KDE.