Also, tangentially ... I just went on to https://bl.ocks.org/mbostock https://bl.ocks.org/mbostock for old time's sake, knowing full well that Observable is you

Also, tangentially ... I just went on to https://bl.ocks.org/mbostock https://bl.ocks.org/mbostock for old time's sake, knowing full well that Observable is your new home, and got a Heroku error. Presuming it's because the bl.ocks are no longer maintained, I figured I'd let you know.