Dear students:

If you’re considering emailing a former professor just to check in and say hi, but are hesitant because you have nothing substantive to say, consider this an invitation to go ahead and send that email. It really means a lot.

@ccjones13
What if my email was going to be "your teaching style put me off functional programming for 20 years"? :-)
@marick
@Korny @ccjones13 That probably counts as a substantive comment, so you shouldn't send it.