Binning requires more design work for the chip. I would guess the M1 was designed rapidly and probably they decided that hundreds of different bins for different types of defects wasn't worth the complexity if it meant delaying tape out for a few weeks. It also leads to extra product complexity (customers would be upset if some macbooks had hardware AES and others didn't, leading to some software being unusably slow seemingly at random).
How rapidly? And so how come it has such spectacular performance? Or the shortcomings of the x86 arch were so, so soooo obvious, but nobody had the resources to reaaallly give a go to a modern arch?
Or maybe, simply the requirements were a lot more exact/concrete and clear? (But the M1 performs well in general, no?)
