You are not talking about just viewing two windows at once. You are talking about a very particular way of doing so, which is the way you are used to. Everyone experiences this with all kinds of interfaces. If a new interface does not work that particular way, you have the options of: adapting yourself to the interface, adapting the interface to yourself (e.g. with third-party software), rejecting the interface, or complaining about the interface on message boards. I happen to believe that the former options are preferable to the latter.

And no, I do not need you to list anything. This is not a macho pissing match and I am not insulting your manhood. Use what works best for you.