Sure they could. They could basically fork macOS and maintain an entirely separate version just for developing iOS, iPadOS, WatchOS, and macOS. I don't know w

Sure they could. They could basically fork macOS and maintain an entirely separate version just for developing iOS, iPadOS, WatchOS, and macOS. I don't know why in the world they would do that. This whole "issue" is just Apple trying to get people to put their software in the Mac App Store. Maybe a day will come where Apple try and lock down macOS to the level that they have locked down iOS... but I just don't see it happening. Apple will always need developers to develop software for Apple products. Maybe they will drop a nuclear bomb on themselves. Anything is theoretically possible.