> А команды работающие на GO продуктивнее в 50 раз

Забавно, но он там же и про го сказал. Сказал, что разработка на го занимает примерно столько же времени сколько на расте, примерно та же продуктивность разработки, но на расте выходит уменьшенное потребление памяти и уменьшенное число ошибок в течение времени:

Google found that porting Go to Rust "it takes about the same sized team about the same time to build it, so that's no loss of productivity" and "we do see some benefits from it, we see reduced memory usage [...] and we also see a decreased defect rate over time"

On re-writing C++ into Rust: "in every case, we've seen a decrease by more than 2x in the amount of effort required to both build the services written in Rust, as well as maintain and update those services. [...] C++ is very expensive for us to maintain."