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I just want to point out, with VERY GREAT GLEE that we had a very similar conversation back in January, in this very same tree, with certainly John and Devon participating (and I can't see Omar right now, but I'll bet he's there). Random related link:https://twitter.com/noahlt/status/1083841925067661312 …
We’re very good at this spaced repetition thing. Here is me hitting on the same theme again almost exactly a year ago:https://twitter.com/backus/status/1039739206229270528 …
Glass half empty: Twitter is an echo chamber
Glass half full: An echo chamber filled with smart people is spaced repetition disguised as funI like your approach. Different to mine, where I simply won't shut up about it - one continual, never-ending massed presentation! 
So, er, we're using community-based spaced repetition to have discussions about community-based spaced repetition. Which means either (a) it's a great idea; or (b) we're all really forgetful.
I think this is one of the great benefits of having the seniority mix that prevails in e.g. HN, because “But maybe someone should charge less?” is the most reliable way to get me to explain pricing advice to a few hundred people.
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