We must retain liveness and exploratory practices within the programming systems that make us feel most productive.
However, the temptation to just reuse \emph{black boxes} through limited interfaces is pervasive.
We \emph{expect} time savings and better performance at the cost of \emph{poor repairability}.
Fortunately, we also know about the benefits of having an open implementation constructed from familiar materials, integrated with familiar tools.
Consequently, it is primarily a matter of ``just building it'' … again?
Piece of cake.
What could possibly go wrong?