You can also replace all `a |> b` with a fixed arity `pipe2(a, b)` in your code and again, no new operator needed. Anwyay, I don't think such optimization issue

You can also replace all `a |> b` with a fixed arity `pipe2(a, b)` in your code and again, no new operator needed. Anwyay, I don't think such optimization issues are enough to justify adding this operator to JavaScript. In other functional languages it may make sense, because operators work differently there (e.g. they are interchangeable with functions, there is support for overloading, etc.). > I'd love to see the addition of well-known symbols for all the operators to allow custom overloading. Sure, if we had support for first-class overloadable operators then a proposal to add a standard operator like `|>` would make sense. But we don't, so a better one would be to add `Function.pipe` (simple, fits into the language better) or allow operator overloading, etc. (also may be reasonable, but it's a major change in the language).