Not to mention ARM chips which by and large were/are more efficient on the same node than x86 because of their design: ARM chip designers have been doing that efficiency thing since forever, owing to the mobile platform, while desktop designers only got into the game quite late. There’s also some wibbles like ARM insn decoding being inherently simpler but big picture that’s negligible.
Intel just really, really has a talent for not seeing the writing on the wall while AMD made a habit out of it out of sheer necessity to even survive. Bulldozer nearly killed them (and the idea itself wasn’t even bad, it just didn’t work out) while Intel is tanking hit after hit after hit.
Now I don’t know where you’re from but around here four year olds are unsupervised in public. It’s also not about the concept, but about what is considered right and what’s wrong, and the self-control to not act on an overwhelming impulse from the unconscious. May I remind you that the frontal cortex, that which gives us the ability to pause and reconsider, is not fully developed at his age.
You have no idea what his psychology looks like, yet you’re condemning him, and thousands more, by your principles. Unseen, unheard, and yep that – unseen, unheard – is one of the possible depth-psychological reasons why kids lash out like that. Not only do you, self-righteously, condemn him, you also might have created him by the habitual way in which you regard – or rather don’t regard – people.