Here's a nice article showing that CoffeeScript was on Brendan's mind when he was working on Harmony (ES6): https://brendaneich.com/2010/11/paren-free/
He calls Ruby/Python/CoffeeScript "unsyntax" and he doesn't like it I think :P
edit: apparently he does like it, he just doesn't think it would work on the web, he elaborates here: http://intertwingly.net/blog/2010/11/25/Hobgoblin-of-Little-...
The page is a list of examples of Coffescript done in Javascript. Whether they show evidence of Javascript taking features from Coffescript isn't really a subjective question; they do or they don't. I explicitly enumerated which do and which don't.
In terms of "experiencing the times differently", that is subjective, so I guess we did. One blog post from Eich on why he doesn't want to remove braces isn't really holistic, but you might be right in general.
I'm not sure how you figure you enumerated which do and which don't. Apparently I'm preaching something unpopular, all my comments have been downvoted a bunch.
Not sure what "outside the loop" means here but do you have a source for this statement? I followed ES proposals quite closely throughout and wasn't aware of any such thing.
> Here's a list of comparisons between CoffeeScript and ES6/7:
> Note that these are features that were not in ES5, then they were in CoffeeScript, and only then were they added to ES6
Unless you supplied the wrong link, I think you're mistaken here. Of the many examples in the link, the majority are code that was in ES3, or—in the case of array methods—bare little resemblance to Coffescript (I think a lot of those were inspired by Underscore).
The exceptions are fat arrows and spread, and I think the latter has a more complex history.
Two other notables in that link: lexical scope was in JavaScript 1.7, introduced in Firefox 3.6, predating Coffescript's introduction. Generators had an early form in JavaScript 1.8 but the syntax changed for es6, and Coffescript adopted it after es6.