90 minutes ago, I wrote:
> Is it anticipated that l3draw and coffins will eventually
> interoperate sufficiently to base a coffin offset from a
> l3draw node?

And then I saw `\draw_coffin_use:Nnn` in the l3draw documentation,
which answers my question.

(Obviously this won’t be useable for months, years more likely, and is
now only a curiosity.)

—Joel C. Salomon