>Having one menubar for each app wastes *so* much screen space!
Where? If I move my application's menu bar from one place to another, how does that alter the screen space available for the application? If you have several windows vertically stacked I can see that it would make a difference, but is that something you'd be doing on a short widescreen display?
(I'm actually genuinely curious about this because this argument has always seemed weird to me and I'd like to understand the use case where it applies)