elon can see this direction. whoever invents self-driving cars first, will kill cars as we know it, completely. so it makes sense then, that if anyone should invent what kills tesla, it should be tesla.
alot of elon hate on hn but he is making objectively very good bets. he doesn't have a pr department like the other guys do (who direct their entire wardrobe, body language, gestures, do speech coaching, etc.), and i suppose we can say that the pr guys are vindicated! zuck, gates, cook, all rehabilitated their public image no-problem.
On Musk, he doesn't need PR so much as to keep his mouth shut for a while and try and deliver on some of his BS instead of spouting more.
Yaml has its uses cases where you want things json doesnt do like recursion or anchors/aliases/tags. Or at least it has had - perhaps cue/dhall/hcl solves things better. Jsonnet is another. I havent tried enough to test how much better they are.