That is a good point that it could apply to any missing feature; my point is that to say that any particular feature is "never" going to make it into the langua

That is a good point that it could apply to any missing feature; my point is that to say that any particular feature is "never" going to make it into the language is short-sighted at best. Just a handful of years ago, you could say that "if you want some form of Function.prototype.bind then you're always going to have to polyfill it yourself", which of course would be a 100% inaccurate statement.