[nextos]

Sure, but in practical terms are there any laptop makers that sell any CPU from that list, say a i3-1210U, in a good case and with good cooling?

Because, as I said in the original post, even when Apple was selling Core 2 Duos, their cooling was better than most other manufacturers. I was often buying Macs to run Linux because of this.

Also see what the parent post says about performance per Watt, which mirrors my experience as a user. No current x86_64 machine is close to ARM if you want low heat.