> Oh come now, there are millions and millions of professionals using macOS to do work every single day.
Right, and how many of those are using macOS because they're "forced" to, as a sibling suggests, or simply by force of habit?
Moving from macOS to Linux or Windows (or from any one OS to any other, really) does require some time. It's not necessarily difficult, but it still takes time. Time that the same professionals might find is better spent on their actual professional work.
It could be argued it's a boil the frog situation, but for me that means the incentives to change the OS aren't quite there yet. Maybe if MacOS 10.17 goes too far with restricting what people can run on it, there could be more people switching. But remember, many of those "professionals" are not programmers, they use standard "enterprise" software, like Adobe or whatever. I bet most of those people have no idea what a terminal is. They would probably not even notice such restrictions are in place.