No offense, but this is one of the silliest recurring discussions ever. It’s like politics where people vote against their own best interest out of sheer tribalism.
It’s clear that most if not all of those sngle window designs in that class can mimick Cubase’s window arrangements because docking is optional? Do some here really think people using Reaper, Logic, S1, DP, Sonar, etc, can’t put their mixer or editors on monitor 2 if they want? That they’re locked into a single window docking arrangement?
Apparently so based on some comments here. 
Is there any manual window arrangement Cubase allows that can’t also be done in those apps? Not really… which is why I don’t get it, never did. It’s all win, you lose nothing.
Will someone please explain to me in detail what you can do with Cubase’s windows that can’t be done today in those “single window” apps? All of their windows - and some of their toolbars - float. Dare I say, their floating mixers can actually fill an entire second screen… and be stretched vertically.
They’re not exactly Garageband.