> You can also write Swift code and use another transpiler to get JavaScript code from it and you would say that JS is great.

I haven't read the article yet, but what you're saying is something completely different, in my opinion. If you write Swift you're writing a completely different language, with all the hassles usually introduced when transpiling. TypeScript, however, is just Javascript with some of the assumptions made explicit and a transpiler that actually checks whether you're violating those assumptions. In that sense, it's not much different from a linter - another tool that makes Javascript more pleasant to write.