That said, the main counterargument to this proposal is that it's already possible to get "left to right" composition in userland without this operator, as unde

That said, the main counterargument to this proposal is that it's already possible to get "left to right" composition in userland without this operator, as underscore shows. The main counterargument to "do it like underscore" is that underscore still ends up being an object whose methods are added to a prototype, not imported. The benefit of the "pipeline" or "bind" approach is that you get left-to-right composition while still importing the names you're using.