- Translating a statically-typed Object Oriented language to JS wouldn't produce hugely different (/horrific) code. From inheritance to lambdas, there are comparable features available in JS. Going from JS to C# might be harder though.
- It might be simpler to write JS, but I can imagine people wanting to see if type-safety has benefits.
- It might be simpler to write JS, but I can imagine people wanting to see if type-safety has benefits.