Maybe you should trust the judgement of the highly-qualified engineers then when they decided to go with their own toolchain, and not just assume that they’re doing it because plan 9 or some other vacuous reason.
I bet they've designed and executed on more programming languages than you have :)
I see a trend here.
And yet hundreds of thousands of working programmers around the world are productively using Go while still continuing to ignore the supposedly superior solutions.
Hundreds of developers used Basic, Pascal, C, Modula-2, Assembly, Forth productively.
Maybe we should have kept using them, instead of coming up with programming languages that require a PhD. /s
Here's another fallacy for you: false dilemma.