Clojurians Log v2

What's the approach to handling two apparently mutually exclusive feature requests in Ask? These two regarding group-by pull in different direction Assuming group by takes a reducible: https://ask.clojure.org/index.php/12319/can-group-by-be-generalized?show=12319 Assuming group by is a reducing function: https://ask.clojure.org/index.php/12097/group-by-reducing-function?show=12097#q12097 I came back to it after watching Chris's talk and the similarities between group-by and frequencies. The first case generalizes to it, while the second doesn't (I don't think) Additionally, since group-by always takes a reducible, isn't the latter equivalent to passing group-by as it currently exists an eduction?