By the way, David, here's a suggestion that only occurred to me too late. Your post is very clear, but if you want to provoke more discussion it's good to include something a bit more "stressful" - like a question, or a challenge, or something shocking or hard to understand. It seems that if everything is easy to understand, fewer people seem motivated to say anything.

I like discussions, in part just to know that people are paying attention. So I deliberately include a bit more gnarly material. You can put it at the end, and mark it as such, if you don't want to scare away people who find it scary.