[dgoldstein0]

I don't view it so black and white. While certainly parts of how we ended up using coffeescript weren't great and ended up causing lots of problems, in 2012 it looked like a net win - we got a bunch of new language features several years before they were actually standardized in any form.

It wasn't until 2015 that es6 came around, and we saw how things could be better; and typescript didn't have much momentum until 2015 either. Without a crystal ball, it'd have been very hard to predict this shift.