Chatting with @hynek tonight, seems like there's a market for a Delete/delete flag to remove the value at a path if it's empty, and its parent if it's empty, and so on.

Kind of like rm -r (or rmdir, in that it fails/stops if the container isn't empty).

(Tangentially related, remap can do this for a whole object, but it's not very convenient for recursively deleting a specific path.)