I never said macOS wasn't portable, so I'm not sure what you're getting at? My point is that iOS would suck on desktop without a lot of work, and a lot of that work would fall on app developers, not just apple.
The article is saying that intel should be worried because Ax chips are competitive with their chips. Whether iOS is a good replacement for Mac OS is irrelevant. Mac OS can run on Ax chips with no significant effort from Apple and not much from third party developers.
