But we have a natural experiment of the opposite: Microsoft has bent over backwards to maintain back compatibility. And those old APIs have been the major sources of vulnerabilities, fragility, and maintenance cost. They do occasionally bite the bullet (e.g. old versions of Word are no longer readable) but they go out of their way not to.

I really don't like Windows for my own technical reasons but I have tremendous respect for the amount of effort MS has put in over the years on this front and I sympathize with the consequences.

Apple has a much smaller "surface" (both vulnerability attack surface as well as surface ear of their own code base) which makes many technical decisions much easier.

So either way means a choice; you can't say one is absolutely superior to the other.