This argument is a bit of a red herring. Ever since the dawn of OS X Apple changed nothing at all about how multiple monitors work with the OS. If you don’t use (the much later added) fullscreen function in some apps or (the much later added) Spaces there is no problem at all. That’s why all the arguments about multiple monitors being unusable are honestly a bit ridiculous and over the top.
The problem was always how those two features interact with multiple monitors, nothing more. And, honestly, I think the fullscreen functionality was never intended to be used on larger screens. That’s for the MacBook Air, not anything larger.
But, yeah, Apple changes how the fullscreen functionality and Spaces interact with multiple monitors. (And personally I cannot understand why anyone would use apps in fullscreen mode at all. It just such a waste of space.)
So your argument is "basically nothing is wrong (first two paragraphs), and if it is, it's because you are using it wrong (fullscreen = waste of space)"?
That's a special point of view, and sort of the contrary of what jakobe and others are saying.
Anyway, for an example of how fullscreen makes sense I suggest you look at video or audio editing software. You just need all the space you can get there.
That's a special interpretation. The parent comment is correct that they didn't actually break anything, they just didn't implement the new features thoughtfully. You could still maximise windows just like previous versions.
How multiple monitors interact with Spaces and apps in fullscreen mode sucks and Apple very much screwed that up. No argument there. But to conflate that with “Apple finally brings multiple monitor support with Mavericks” is wildly misleading.
Also, you could give apps the full screen to work with since forever in OS X. You do not need a special mode for that. Apple’s fullscreen mode is most definitely not in any way equal to Windows’ maximize function. I think that’s what many people fail to notice.
The problem was always how those two features interact with multiple monitors, nothing more. And, honestly, I think the fullscreen functionality was never intended to be used on larger screens. That’s for the MacBook Air, not anything larger.
But, yeah, Apple changes how the fullscreen functionality and Spaces interact with multiple monitors. (And personally I cannot understand why anyone would use apps in fullscreen mode at all. It just such a waste of space.)