Idea: Reimagine given current and future proposals

[chriskrycho]

Context: @bmakuh and I have been talking about this privately for some time. This library will not—repeat, will not—be going anywhere. This proposal would be a parallel in addition to True Myth proper, not a new version of this library.

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There are two major language features which have already landed in JavaScript and one which looks likely to land in the next year or so.

• Already landed: the ?. and ?? operators
• Likely to land: the |> operator

There are also some performance concerns in sufficiently large apps, where memory pressure starts to be a problem, with the current implementation of Maybe in particular. (Nearly everything that follows is Maybe specific, because there's no way to make these kinds of simplifications for Result, unfortunately.) It would be extremely useful in these contexts for there to be a functional-only approach which lets ?. and ?? do some of the work we have historically needed tools like Maybe for, in combination with combinators for transforms.

What should they be? What would a minimal, extremely high-performance Maybe implementation look like given the new language features? Can we/should we assume |> lands at some point?