I'm certainly not against chaining combinators in general. In fact, I love functional programming and I enjoy Scala. I'm only specifically criticizing it in Jav

I'm certainly not against chaining combinators in general. In fact, I love functional programming and I enjoy Scala. I'm only specifically criticizing it in JavaScript and other languages that decided to import functional programming features onto eager collections. Scala's standard collections are implemented as persistent collections, so the overhead for each combinator call is small, and could even be optimized by the compiler. JavaScript doesn't have a compiler, so the best you could hope for is a JIT optimization, but even that's impossible for several reasons related to the dynamic nature of the language. As an aside, I sometimes like to shit on Java, but the language is very well engineered, despite its "original sins" that make me hate it. When Java decided to import functional programming niceties, they didn't just tack `map` and `filter` onto `Collection<T>`. They added the whole `Stream` API which does the best possible thing given what the language already was.