Following the successful laboratory demonstration, a prototype chip could be ready by 2030, the scientists said in the study.

The researchers think a further reduction in the thickness of the Mn3Sn layer will reduce power consumption even more. The next challenge, they added, will be to develop a commercially viable bulk manufacturing process capable of building the device at scale.

Aside from the viability of producing the chips at scale with rare minerals, there’s another item I don’t see answered: they’ve produced one of these in the lab — but that’s like producing one transistor. Modern CPUs have ~20billion transistors. How tight can these new systems be packed? If they’re fast and efficient but 20 billion of them would take up a football field, that’s not going to be very useful.