It's an interesting interview but also horribly frustrating.

There's talk about vectors, longer basic blocks and cache utilization and how they wish programmers used more of it, it misses the real world.

Regardless of how "hardcore" programmers feel about it, so much real world executed code is built in JS,etc. The JIT:ed code is super-branchy (to cater for deopt fallbacks) and won't use vectors at all.

This is something Apple has gotten correct with their vertical integration as they seem to have put more focus on making real-world code go fast. Even most games will have huge swaths of non-vectorized code that would benefit from a more scalar focused way of optimizing.

Considering transistor counts in use today, instead of bigger vector units,etc it could be spent on bigger UOP buffers, BTB buffers, bigger caches to eat up branchy-but-linear code flows that are reality for less "optimal" languages).