Vector instruction sets expose too much about the size of the CPU. They have got bigger over the years, 128 - 256 - 512 bits, 8 - 16 - 32 registers, and now Int

Vector instruction sets expose too much about the size of the CPU. They have got bigger over the years, 128 - 256 - 512 bits, 8 - 16 - 32 registers, and now Intel is struggling to fit them comfortably into their small efficiency cores and retain binary compatibility with their big performance cores.