gradually making new paradigms
Early Intel processors had external memory, interrupt, dma, npu, i/o, etc units.
The cpu wasn't much, registers, alu, branch/next instruction fetch & decode, etc.
M1 has shown the efficiency of bringing the main ram onboard, big deal, no, progression, yes.
First to do it, hell no.
Rupert is correct in that Apple has tailored the M1 to a specific task
and this is where the ARM ecosystem has been headed for a long time.
A designer has a need, finds an MCU to fit the requirements,
or if you're big enough, roll your own MCU.