Investment ratio in Go is only good because of how little you have to invest. In Rust the required investment is bigger, but you get a lot more in return. Not sure about which ratio is really better.

GC is only a minor reason I chose Rust over Go for a networking related project. Despite having a GC, Go definitely feels more low-level and less structured than Rust, and leads to code that is longer and harder to reason about.

It is very similar to how a language with only a goto instruction to do control flow would be definitely simpler/smaller than a language that supports functions, loops and conditions, but the actual programs written in it would be brittle and harder to understand.