A goal of Go was to put working on complex distributed systems within the reach of the junior people Google had access to in the quantity they were hiring. To whit, the kind of people who would have been able to work on a big Python system with 3 months ramp up or on a big C++ system with a year of ramp up.

It is pretty clear that with respect to that goal, Go is a success. It has attracted Python programmers who need type safety and performance. Someone with no Go experience could land a useful new feature in a big Go program in 3 months.

Introducing a junior person to a large Rust system would still take a year, because it is so much more difficult than Go. Which means to me that if Rust had been aiming at this same adoption goal (it wasn't) it would not have succeeded where Go did.