Comment by goku12

That makes sense. Just adding a clarification here. I wasn't suggesting to replace the standard library with interfaces (traits in this case). I was saying that the core library/runtime should have the interfaces for the standard library to implement some bare minimum functionalities like the allocators. Their use is more or less transparent to the application and 3rd party library developers.

Meanwhile, the public API of the selected standard library need not be abstract at all. Let's say that the bare minimum functionality expected from a 3rd party standard library is the same as the official standard library. They can just reimplement the official standard library at the minimum.