If you are making stuff for iPhones, you essentially have to have a Mac because XCode to create iPhone apps requires a Mac to run. I meant the majory of app creators are Mac users. So if they kill the Mac workflow then they will castrate the cash cow that is the iPhone.

I know there are alternative workflows you could make by using something that can cross compile to iPhone and using a Windows/Linux system, then renting a Mac device via a cloud service like AWS, but I would be surprised if it made up a significant amount of development.