Comment by qsort

I agree with the goal of the package, but I feel it doesn't do a good enough job of picking a lane between the imperative and functional approach.

If you're going functional, a list is both a functor and a monad, so you definitely need at least map and flatMap for the abstraction to make sense.

On the other hand there are a lot of "in place", "insert", etc, which encourage working with mutation.

You probably need a bit of both, but I'd like a more top-down design better.