[arecurrence]

I'm going to be a bit of a naysayer here and comment that while I fully appreciate and endorse TypeScript... there are certainly situations where Javascript would be preferred. EG: Deno also dropped TypeScript internally.

What they've done seems a bit rough around the edges and a types file of some sort for external facing customers is a critical follow-up PR, but I would not blindly trash these guys for switching to Javascript. I suspect they did it so quickly because it would have sat in committee for eternity otherwise.

I probably wouldn't write anything in pure JavaScript today when TypeScript is such an enormous boon... but I'm also not working in the space that this project is working in.