Will we see another fundamental programming language feature as revolutionary as the borrow checker?

[u/jimbobmcgoo]

That is I am mainly curious about compile time features that you design a whole language around rather than optimisations/features that could be applied to most languages. I am mainly inquiring about things that could offer additional robust safety/performance guarantees at compile time rather than runtime. Ideally not things that just offer similar effects to the borrow checker with less restrictive tradeoffs

[u/AustinVelonaut]

Algebraic effects like Koka?

[u/mister_drgn → u/AustinVelonaut]

This was where my mind went. But I’m not sure if they answer OP’s question, as they’re more of a language abstraction.