I know how easily internet comments land on sensitive feelings—it happens to me every day—but this reply breaks the site guidelines. It takes the thread in an off-topic, unsubstantive direction, and it doesn't do what we ask here: "Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith." (https://news.ycombinator.com/newsguidelines.html) Even though it felt like geocar was lecturing you, the stronger plausible and good-faith interpretation was to assume otherwise. In that case the discussion could have continued to exchange substantive information and readers could have learned more.

Strangely enough a similar thing happened in an unrelated thread yesterday: https://news.ycombinator.com/item?id=20062560.