He explains, at length: there is no sane way to determine what the hardware you are running on actually supports, and so there is no sane way to ship compiled code that is both compatible and performant.
We already had the mystery meat CPU wars several decades ago. We know how to make sane ISAs now and should be past that.
We already had the mystery meat CPU wars several decades ago. We know how to make sane ISAs now and should be past that.