Update June 10 2020: I saw that this design doc was being discussed more widely. Most people don't have the context to understand this narrow technical document - it is only applicable to a very particular, very technical situation in the internals of Deno. This is not at all a reflection on the usefulness of TypeScript in general. It's not a discussion about any publicly visible interface in Deno. Deno, of course, will support TypeScript forever. A website or server written in TypeScript is a very very different type of program than Deno - maybe much more so than novice programmers can appreciate - little of Deno is written in TypeScript. The target audience is the 5 to 10 people who work on this particular internal system. Please don't draw any broader conclusions.
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In the original design doc: https://docs.google.com/document/d/1_WvwHl7BXUPmoiSeD8G83JmS...