> But they would never give a speech about how they messed up by describing everything with maps.

I think this needs to be emphasized and can easily be transferred to a whole bunch of other topics unrelated to DDD/Clojure.

Nobody ever talks about the negative sides of some new apparently cool thing, because it is assumed that doing so wouldn't attract an audience. While in reality, often cool new thing does only work as advertised in a minority of cases and the negative sides are more important to look at.

We should more often talk about the negative sides of "cool" new approaches.