I submitted this essay in 2018 (https://news.ycombinator.com/item?id=16792375), but it didn't get any traction. As people still appear to enjoy it, and today seems like a slow news day on HN, I'm submitting it once more.

If you don't like Medium, here's a link to the same essay on our blog: https://www.calcapp.net/blog/2018/04/09/launching-after-15-y...