Well, I was huge fan of CoffeeScript, so you’ve got me there. I don’t regret a single one of the (many) times I used it though. It made me and the teams I was part of significantly more productive and allowed us to produce more concise and maintainable code than we could have with plain JS. I feel the same about TypeScript today except honestly the productivity gains are a lot more dramatic.
For me, most of the key CS features that made me reach for it all ended up in ES6. And while I also prefer CS indentation to braces, I don't see that as very important.