The bigger deal about the M-series performance and efficiency is SoC, not the ISA. This is something that could take off in the x86 world though it stifles upgradeability
This is a laptop chip, though. Upgradeability seems to be not a thing anymore at this point anyway (besides maybe an m2 slot or two). I don't think Lunar Lake even supports non-soldered memory even if the laptop manufacturer wanted to use DIMMs.
I agree. It's getting more and more pointless to avoid SoC. No need to do expensive bus transports when you can just stay on-die. The only upgradeability that's needed is to swap out entire SoCs.