I'd almost go as far as saying this is an A+ puzzle, it's not quite there though, so I'd have to give it an A.
I thought this was going to be too difficult but, after a few clues, I'm sure I'm going to Ace it.
A missed opportunity for 65 clues.
Notably missing from the clues is "a famous quote from Arthur Herbert Fonzarelli."
Or I'm just old.
Fantastic puzzle! I've got them all except "string whose SHA-256 hash ends in '…689510285e212385'". How am I ever supposed to guess that? What does Randall think I am, a supercomputer?
Brute force. Just start at A*(number of letters) and go from there ;)
I'm stuck on 21 across - default paper size in Europe. Surely it should be "A4"?
AAAA
I immediately knew the answer to 1 Down, but it still took a while to get the joke.
I thought it was VVVVV at first and was confused
If you want the answers, you can find them here: https://www.explainxkcd.com/wiki/index.php/2957 (great site for when you don't get an xkcd joke). But, really, give it a try on your own first.