https://clojurians.slack.com/archives/C03S1KBA2/p1557433835426200

Well, that's almost certainly way oversimplified. The rabbit hole looks rather deep. Thoughts on approach welcome.

devn What is the rabbit hole that this patch leads to?

I don't think making seq work on transients would be a viable solution

only way to do that would be to make a full copy of the data structure, is my hasty guess

(defn empty? [c] (zero? (count c))) works for transients

I'm not sure that suggests any good implementation though; you wouldn't want to use that on lazy collections

switching on whether it's a transient or not leads to the old "does it make normal things slower?" conundrum

the most plausible thing I can imagine is rewriting empty? in terms of a new interface or protocol

which sounds like at least moderately sized work