Is this what modern idiomatic TS looks like?

Reading through the pipe implementation, as someone who primary works in the relatively "boring" world of backend languages, this looks like the kind of code that would get shot down review for being too clever and not very readable, regardless of how "elegant" it may be.

Using triple assignments (a = b = somevalue)? Using λ as a type name instead of writing out lambda with symbols that are actually easy to type? Overloading/reusing variables that makes it hard to mentally trace how data flows through?