> You can use records for the data structures. The only little annoyance is that you need to write the functions as static methods. So an argument for easy translation would lead to C#. Also, C# has advantages over Go, e.g. null safety.

Wouldn't these things be useful if you are making an actual compiler, that would run TS? Since in this case, the runtime is JS, I don't think any of these things would get any usage, unless they are used in the existing transpiler.