The CUFP talk was in this very nice room with 60 people or so.  I
focused on why and how we use Scheme extensively, explicitly comparing
to Nix{,OS}, which the majority of the attendance already knew.  Among
the questions I had, one was “how do I upgrade from Nix?” ;-), and
another one was the inevitable (given the venue) “what do you think a
static type system would bring you?”.