[KirinDave]

> How do you even handle that?

You request a smaller block of memory? Not everyone is always requesting the minimum they need right now.

> Would probably let it crash and restart (Erlang model)

The Erlang model is to let a partial failure trigger a less complex part of the system to resume that logic based on a strategy.

> Then it's fair to say that you definitely can't get an error by adding two numbers.

I mean, you can also accept garbage back, I guess?