I'm not convinced that's really the case. The M1 MBA thermal throttles, and there's not much you can do about it, it doesn't even have a fan that you can crank up with Macs Fan Control. They can't handle ANY GPUs, they can't handle more RAM than they ship with, they can't handle as many displays as the Intel Macs, they can't... it's a long list.
The Acorn RISC Machine isn't a new chip. It's been around a LONG time. And EVERYTHING is hitting a wall now, the end of Moore's Law is a real thing because we're near the point where traces literally can't get smaller without quantum computing being a workable thing because a trace on silicon can't be less than 1 atom.
0.1 NM is, without question, the absolute end without quantum computing, and 0.5 NM is probably unrealistic.