With that said, implementing it is not easy, especially in terms of ensuring it is as fast as built-in string or faster (because the project goal is to be faster than built-in string and Go implementation, and match or outperform Rust's String where applicable).
I can't imagine something like that being possible in e.g. Java or most other high-level languages - they simply do not expose appropriate low-level primitives when you need a "proper" string type.
