I think the 12" MacBook was a great design. The ultimate compact laptop - I even would have bought one if that day the Apple Store had one in stock. But it didn't work out technically. Maybe it had, if the Intel 10nm process had been right on schedule. With the 14 nm parts, it was just too much of a compromise. With the M2, Apple might consider bringing back that form factor, that should work nicely. And move the Air to 14", tiny bezels. That would be the outer form factor of todays 13".