It's the intersection of the difficulty of dumping heat in a tablet form factor combined with Intel's godawful thermal profile/management. This form factor is where ARM wins hands down. Better thermal design would help, but it's a hard problem in a tablet. Fat heat channels to the backside seem obvious, but not if the back is uncoupled to ambient air (sitting on something). Screens have a large surface areas and are always exposed, but the materials are not thermally useful. R theta JA Good luck with that...

No consideration given Garmin? It's a relatively popular line with many professional endurance athletes.

Sorry, requiring me to traverse a crowd, get a 'bagel' from a cretinous bouncer and unlock a bag in order to deal with a true emergency is only going to get you sued eventually. I have no trouble being told to keep it in my pocket and silent. I have no problem not using it to record shows, take selfies or post to (insert social media site of the day). But if it goes off, I am checking it. I have children. Yes, the species flourished before cell-phones. But we are better off with them. We are even better off adhering to etiquette regarding them.

I would posit that Intel rode the comfortable model it had, bigger, badder, hotter processors every year to feed the market. They have been snookered by the fact that people now love portable, battery operated devices for most of what they consider to be computer use. Intel has not really got an energy efficient, capable processor to match what ARM implementors have on offer. An Intel processor needs a wall plug very close at hand, or a big, laptop sized battery (with a wall plug close at hand). The architecture is likely provably much more energy inefficient (too lazy to look for studies on this) than many of the alternatives. It's a normal part of business, but it sucks for the people being laid off. I think I have a 4004 and 8008 lying around somewhere. My father and I experimented with these when I was a child.