I agree that it is a good name and evaluating this on "ML tasks" was novel. However this and subsequent papers did a really poor job in delineating what is novel, from what is well known. Moreover this is a pattern in almost all subsequent papers, where people literally pretend that they were the first to consider parameter gradient computation of controlled differential equations, hybrid dynamical systems, etc., while in fact this has been worked out in full generality since essentially the 60s.