This is a very valuable article about what it would take to do such a migration. I also work on a large CoffeeScript + React codebase (https://github.com/sagem

This is a very valuable article about what it would take to do such a migration. I also work on a large CoffeeScript + React codebase (https://github.com/sagemathinc/smc https://github.com/sagemathinc/smc), write a lot of new CoffeeScript every day, and I have no plans to do a rewrite. I just don't see the value of doing a rewrite, given how hard it would be. I like CoffeeScript, find it expressive, and I think it would be easier to fix or maintain the relevant CoffeeScript tooling than to do a rewrite (just because a rewrite would be so damned difficult). Also, CoffeeScript really is sufficiently close to Javascript, and it interoperates effectively enough for now. CoffeeScript is not totally dead. There's pretty regular activity this month (see https://github.com/jashkenas/coffeescript/commits/master https://github.com/jashkenas/coffeescript/commits/master). That said, personally, I find the stability of CoffeeScript to be kind of nice, considering how much churn there is in the rest of the Javascript world. The language barely changes at all, and that's kind of nice.