[nbevans]

I thought that too. What a bizarre phrase to apply to a language he clearly loves. Enterprise level type checking normally means supporting pretty much just the concept of "classes" (ala Java) and calling it a day - leaving the developer(s) to take the burden and create all sorts of god awful "design patterns" to work around fundamental flaws in their language of choice.

I know that is not the case with TypeScript. I believe the recent version added support for union types which is going to blow the mind of the naive JavaScript masses, for sure.

Describing any language as "enterprise grade" is rarely a good thing. Wording and phrasing is important.