On the other hand, Go's type system is so bad that it nullifies all the benefits it brings to the table. I'd rather have no type system than Go's type system, but why even ponder that if I can have everything? With JS I can start out with dynamic types, then switch to static types if the need arises (typescript, flow), fully or partially. Oh, and both of those have really good generics btw.

And we have async/await too now, which means async code can also look almost the same as sync code. So I would still choose JS over both Python and Go (at least for that particular use case). mypy still has long ways to go before its anywhere near TS or Flow.