> writing on the wall is obvious that MacOS is on it's way to being deprecated
I must have my back turned. Where is this wall? Apple seems to be investing quite heavily into its Mac line-up, including by differentiating it from iOS devices.
I think the biggest danger for the developer crowd is that Apple locks down MacOS so much that our tools and workflows become more limited and difficult to use. I'm not saying that will happen, but it seems more possible today than it did five years ago.