Apple has been merging the two platforms since at least 2018, it’s just becoming more and more obvious.
He also stated they were NOT merging the two platforms, and yet here we are.
Why sell people one device, when you can sell 'em two.
This is how I know that Federighi was talking ■■■■■■■■. Overtime, not only have iOS bugs appear in the macOS, but even to the point that last year, macOS functionality stopped working and the solution was to use documented iOS methodology to solve the problem. Apple still haven’t updated their docs and I can see on the Apple Developer forums, that developers are continuing to face this problem.
Merging the platforms makes sense, but it was the lying and the lack of care that makes this sad.