It's never been done before, and can never be done after, obviously. Not a chance. Nope. It's not like it worked before, not like windows placement is not really the business of the taskbar app, not like it works with almost every other DE/OS, too.

Absolutely impossible. Microsoft, that apparently did not make windows up until now otherwise they'd know this explanation is pure bullshit, have absolutely no way, no resources, no knowledge on how to setup the available rectangular area on the screen for window placement. Nope.