Not sure why you think FAANG is getting the cream of the crop. Looking at stuff like Rob Pike's comments about Go's use for the general Google employee base [0], I think there is quite a lot of misalignment between the aura of mystique from the outside and the situation as seen from the inside.
[0]“The key point here is our programmers are Googlers, they’re not researchers. They’re typically, fairly young, fresh out of school, probably learned Java, maybe learned C or C++, probably learned Python. They’re not capable of understanding a brilliant language but we want to use them to build good software. So, the language that we give them has to be easy for them to understand and easy to adopt.”
[0]“The key point here is our programmers are Googlers, they’re not researchers. They’re typically, fairly young, fresh out of school, probably learned Java, maybe learned C or C++, probably learned Python. They’re not capable of understanding a brilliant language but we want to use them to build good software. So, the language that we give them has to be easy for them to understand and easy to adopt.”
https://channel9.msdn.com/Events/Lang-NEXT/Lang-NEXT-2014/Fr... (00:20:40 up to 00:21:10)