In my programming language I have some sort of "borrowing" too (although it's named differently). But my language has no dynamic typing, only static typing is used and thus all checks are compile-time and have no runtime cost. Why bothering with dynamic typing and paying runtime costs for it?
> The goal is that most of your code can have the assurances of static typing, but you can still opt in to dynamically-typed glue code to handle repls, live code reloading, runtime code generation, malleable software etc.
Dynamic typing is neat, I actually prefer it to static typing. Most people who think they have a problem with dynamic typing actually have a problem with weak typing.
The point of types is to prove the absence of errors. Dynamic typing just has these errors well-structured and early, but they're still errors.
The correct term for languages that don’t have syntactic types is “untyped”.
> Most people who think they have a problem with dynamic typing actually have a problem with weak typing.
All people who say things like this have never studied computer science.