Thanks to Colin's outreach, Balázs Némethi of Taqanu responded with enthusiasm to my request for a use case writeup. His brief one-pager response to the questionnaire is attached. I suggested that he's welcome to provide additional links, diagrams, etc. to ensure we get the detailed picture -- we just can't publish a 10- or 20-page writeup... If you have questions, please send 'em in in this thread, and we can collect them and share them along.