The traffic light buttons wouldn’t work well for touch interactions. They are far too small, and by the time you make them big enough to tap, you’ll be wasting a lot more screen real-estate for no good reason. It makes more sense to use the Multitasking Menu button that iPadOS does, because it’s a single smaller button that expands into separate buttons that are appropriately sized for touch.It still feels like an extension of iOS. Apple could have at least improved Stage Manager by adding the traffic light buttons in macOS or even better: have window management internal part of the OS. However, it seems Apple strategy is to keep it the way is to ensure the iPad doesn't cannibalise the sales of its Mac lineup.