[y2244]

Would guess not intentional.

Apple has little financial incentive to spend money on testing new software beyond the minimal on intel macs.

Unlike older iphones where apps are being bought in large volumes so they make money, a lot of Mac apps are web based or downloaded directly/via home brew. Its only apple music and tv etc they would take care not to break

So Apple have an incentive to maximise the number of older iphones in use to sell apps and so subscriptions but less for Intel macs