The advent of iPhone, iPad and ARM architecture hit Intel so hard they are still feeling the pain. ARM took advantage of Intel inability to react to new ways to user computers.
I hope now that Apple has its own chip design branch, they make a new architecture transition to ARM for the Mac line like they did from Motorola to Intel.
Apple moving the Mac wholesale to ARM would kill a huge number of Mac sales overnight.
I for one would not buy an ARM based Mac, and as other(s) have posted above, the switch to x86 was instrumental in me deciding to switch.
Once ARM has a CPU that has the same capabilities as intel (currently, they do not, nowhere even close) then we can talk about how intel are failing. And even if they do that, an ARM cpu will simply not have the compatibility with the range of software and OSes that intel has.
ARM on MAC is a non-starter.