GC has little to do with it. The borrow checker as a developer tool has much more to do with preventing concurrency bugs and unexpected mutation than it does wi

GC has little to do with it. The borrow checker as a developer tool has much more to do with preventing concurrency bugs and unexpected mutation than it does with memory management. "As a developer tool" is doing some work in that sentence though. As a language implementation characteristic, the checker can help inform (or, more accurately, ensures that code is written in a way that informs) memory management decisions.