If Apple dumps Intel for their own Ax chips, Apple will likely emulate Intel so they don't have the whole "Surface ARM can't run Intel" problem. And I just mean Intel MacOS apps, not Windows.
I don't think Apple cares much about Windows on Macs and see that as dabbling for the 1% Windows crowd. There's so many ways they could find cross-functionality. Bye, Windows. Sorry, guys, but how many of you are there, really?
Mac sales are so much bigger now than in 2005, although I haven't crunched how much bigger Apple is revenue-wise compared to Mac revenue only.
I'm not sure if I'd rather have the last Intel iMac or the first aMac (my name for and ARM iMac). Probably neither.