Earlier quoted context omitted.
I think this is more directed at C# users. The focus of TS is to let tooling (specifically Visual Studio) do the same stuff it does in C#. They tried and failed to make VS good for JS.
Well, even if it's directed at C# by Microsoft, it's used by a lot of people that are not into Visual Studio or Microsoft. TypeScript is a lot more than "IDE tooling", even though proper intellisense makes it a lot of nicer to develop. It's not like Microsoft somehow failed to make VS good for JS, it's theoretically impossible to make VS do to JS what TS can do for any IDE.
Really? Who? I just don't see them or they must be really good at abstracting away this activity.