[IshKebab]

> Sets and Maps are sorted (by insertion order)

That's not what a "sorted set" is. C++ and Rust provide sets (and maps) that sort based on an arbitrary comparison operator.

> ?

?

> but someone will likely be exhausted by that addition

I suppose. I guess it's one of those things that they really should have got right the first time. Like String.replaceAll(). I guess they will never add String.replaceAllSafe() - well just have to rely on linters to tell us that the API is terrible forever.