Comment by 9rx

> so is C garbage collected as developers often add refcounting to their structs.

Absolutely, C also can use a garbage collector. Obviously you can make any programming language do whatever you want if you are willing to implement the necessary pieces. That isn't any kind of revelation. It is all just 1s and 0s in the end. C, however, does not come with an expectation of it being provided. For all practical purposes you are going to have to implement it yourself or use some kind of third-party solution.

The difference with Limbo and Rust is that they include reference counting GCs out of the box. It is not just something you have the option of bolting onto the side if you are willing to put in the effort. It is something that is already there to use from day one.