Most users don't use multiple displays. For the vast majority of users, nothing was broken. Also, the multiple-menubar thing illustrates that it's not exactly a simple or uncomplicated fix following the introduction of fullscreen app support.
I would think that Apple devs would use multiple monitors and would have coded the base functionality so that it made sense working.. Even Windows has had pretty decent multi-monitor support for about 5 years now.
Anyway, I look forward to proper multi-monitor support without have to purchase an expensive 3rd party add on, or manually resizing my windows on different screens.
I'm also hoping that like windows, OS-M will remember what apps are where when I plug in different screens (like home vs office).
Windows has had excellent multi-mon support since at least the XP era, (when I started using dual monitors at work and home in, I think Win98 wasn't that bad either), and to make you feel old, realize that WinXP has been out for 11 years.
