Ball is in your court now typescript-on-the-serverside ppl!
Of course, Go makes zero attempt to enforce nullability (nilability?) in its type system... so... win some, lose some I guess.
I like Typescript a lot but the reality of Typescript development is not great.
If there is, I imagine it's not among the type of people who you'd want leading technical decisions at your company.
Also, application servers are cheap, persistent, fast and durable storage isn't, these won't be written in TS.
TL;DR: different problem domains, not important