The problem is you need both a PL nerd and a performance nerd and while that group has some overlap so these people are not as uncommon as you’d think the task is pretty hard so you need a lot of people on it, with a bunch of funding, etc. Usually it’s just cheaper to rewrite all your code by that point and so these efforts fail

It seems like such a tempting gap though. The sort of thing you’d think in 2015 would be an obvious capability of 2026 languages!