I really cannot say Uber's use of Go is particularly idiomatic to me, having started writing Go more than a decade ago now. It just strikes me as overwrought, and I've worked on big services.

I disagree with the premise of that whole project. It shouldn't exist.

Just because a known company uses it doesn't mean it's authoritative; there's likewise functional programming libraries built by big companies, but FP should also be avoided in Go because it's not a functional language and not optimized for it.