True, just in this case we just went with Mac because we used it personally. Windows might actually have been easier because macOS gets increasingly restrictive (e.g. with Catalina). Nevertheless, glad we made it and we'll do our best to support all major OSes.
I don't want to make this a game of one upmanship but I'd be surprised if there are GUI things you could do on a machinetosh that you cannot do on Windows.
Windows APIs give great info about size and position of windows. Challenging part is really the per monitor scaling, but it’s not impossible either. Great product, top work