NOBODY has transitioned to an other architecture like Apple has, nor has the industry been kicked in the shorts as many times as by apple. (wholesale inclusion of GPU in the OS, migration from Motorola, to Power PC, to Intel, to Arm to X Efficienty + Y Performance Cores...and nobody wrings as much out of the ARM architecture as Apple.
It's 'the same OS' from the watch, TV, Airpods to the Mac Pro.
There is no cost cutting the top end because it's ALL the same Platform. The Top end is the same as everything else with an additional parlor trick.