This doesn't answer your question directly, but some very lucid discussion about a closely-related topic that might be of use to you, if you haven't seen it, ca

This doesn't answer your question directly, but some very lucid discussion about a closely-related topic that might be of use to you, if you haven't seen it, came across HN earlier in the week: https://news.ycombinator.com/item?id=32978355 https://news.ycombinator.com/item?id=32978355