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I really don’t see this criticism. Yes, all of these features have existed in some form in prior languages. But I wouldn’t say that this makes JS “look like” Haskell.

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Agreed. But if F#’s pipe operator makes it to Hack and JavaScript, null chaining makes it to C#, CoffeeScript, and JavaScript, value types make it to Haskell, Clojure, and JS, etc.. Eventually the overlap between different languages’ features grows larger.

Like, I absolutely agree with you here. Languages are starting to stabilise when it comes to syntax, features are getting cross pollinated from other languages faster, etc.

I think it's wonderful. Developers can move between languages interchangeably, teaching burden is reduced, languages aren't dismissed because they lack feature X.

That’s a valid way to look at it, too.

The pipe operator is such a simple bit of syntax I see no reason why it shouldn’t be in most languages. No one complains about the addition operator syntax looking the same in most languages.

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