Wide availability of an ISA creates the economic opportunity for people to hand tune / optimize for it. I wonder if Intel is shooting themselves in the foot by

Wide availability of an ISA creates the economic opportunity for people to hand tune / optimize for it. I wonder if Intel is shooting themselves in the foot by creating instructions that are available only in a tiny fraction of shipping CPUs. AMD would have had a much harder time with Ryzen if AVX 512 was shipping in volume on a bulk of the chips and if a wide variety of software had been written to exploit it.