I haven't worked at Google's scale, but I've heard a lot of critism about tools and programming languages from people who create architectures that are inherently slow. When a user login requires 8 http calls to distinct microservices or something else silly like that the problem isn't a lack of static types. So far in my career I haven't had a programming language ever be the reason why something can't scale, most often the problem is the initial developers lacking a understanding of relational databases and cache locality.