Is this just a symptom of having a lot of engineers and they keep churning code, Golang being verbose or something else. Hard time wrapping my head around Uber needing 90+ million lines of code(!). What would be some large components of this codebase look like?
There's a lot of overlap and some invalid combinations, but you're still left with a huge number of combinations where Uber must simply work. And every time you add a new thing to this list, the total number of combinations grows polynomially.
(Also, Go is slightly more verbose than most languages. I think that's a feature and not a bug, but it's one more reason.)
A lot of people seems to gravitate toward languages with less dense cognitive load. I have learned to love kotlin, but its also a super dense set of syntax to power it's very expressive language.