While hard to say quantifiably, from what I’ve seen almost any new backend service is written in Go (apart from ML-related, which Go doesn’t support). Given tha

While hard to say quantifiably, from what I’ve seen almost any new backend service is written in Go (apart from ML-related, which Go doesn’t support). Given that many-many older services were implemented in C++ and Java, these still dominate. Weird quirk of using Go at Google is that any backend service at Big G mostly copies protos, and in Go you end up with these many-page inline protos initializations, which are unreadable.