April open thread

Given my current posting rate, monthly seems about right for frequency of open threads. So expect one of these on the first of every month, or shortly thereafter–in this case, I was terrified of posting anything yesterday lest it be mistaken for an April Fools joke.

As always, questions for me and post requests are welcome, even though I’ve still got a partially-written post responding to the last open thread that I need to finish. Eek! Time to get on that… Self-promotion is also welcome!