Earlier quoted context omitted.
There's nothing worse than reflexively typing ctrl+z to undo in Emacs and instead have the window disappear into the background!
In my .emacs since time immemorial: (global-unset-key [(control z)]) It's absolutely true that defaults are "bad" in many modern environments (though remember C-z to suspend in a terminal environment makes perfect sense!). But the nature of the editor is customization like this. People unwilling to do this just aren't ever going to be happy with emacs. And for those just learning, tricks like that (c.f. emacswiki.org…
Shipping with some easily configurable presets to mimic other popular tools would probably help new users a lot.