2+2=8
The author's maths are amiss.
The original Bloomberg article refers to Apple using its own A series chips for running macOS.
Nothing about Apple merging its operating systems, though they do certainly currently use a common kernel at the moment, namely UNIX BSD.
Apple have stated previously they don't believe in one OS fits all approach, hence there is tvOS, watchOS, iOS, and macOS. I would be surprised if they were to change strategy simply because they ditch Intel microporcessors for their Macs.
Biting the hand that feeds IT
