News Linux on Apple M1 Project Reveals New Details About M1 System Architecture

It is actually not surprising. Apple will not stick to standards to prevent people from using their hardware on other OSes. Whatever technology they use, as long as it provides good enough performance, I think most people won't really care.
 
Apple doesn't want anyone running non-Apple software on their hardware.

Apple dumped Intel for control, not performance.
I think Apple stopped using Intel due to a combination of the reasons you mentioned. Consider the hype out there about the new M1 chip's performance, it is not surprising they they stopped using Intel. It certainly is not as good as an Intel processor in every aspect, but good enough for their target market and with the added benefit of better battery life.
 
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The M1 is a 'roided out iPhone chip.

There isn't anything wrong with that - it will easily cover Apple's target audience for the MacBook Air. It wasn't designed to do anything that is computing intensive.