This is a stub comment to hold all the replies to the parent. I did not mean to explode an offtopicness charge, and usually turn off replies for these because the same issue comes up every time and the answer is always the same. (When it comes to explaining something, the internet is stateless [1].) Forgot to do so in this case! I'll move them now.
[1] https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...