What I said is that I call bullshit on his 5 points. None of them are valid and they are just opinions of a developer who hasn't put the effort in and isn't providing concrete examples of what is actually wrong. I actually find it difficult to understand why this is even on the front page of HN, maybe it is a slow news day?

I feel that my point is proven with a successful multiple year open source Typescript library.

Great documentation? That's subjective. I'd start with a deep reading of the official docs as they are quite good: https://www.typescriptlang.org/docs/