You're probably missing their tradeoffs. Google has deep expertise in C++ within the company and integration with existing libraries / tools is a huge bonus. So

You're probably missing their tradeoffs. Google has deep expertise in C++ within the company and integration with existing libraries / tools is a huge bonus. So if the goal is a market-ready product and velocity matters, then it makes sense not to adopt a new language that is still changing a lot. It's only your opinion that they've chosen the wrong tool. There isn't one right answer to nuanced product decisions.