When a moderator converts an answer to a comment, the original poster gets told to see the FAQ for why.
However, the rest of us 10k users can see just fine what happened, as could Rob if he looked in the recently deleted queue quickly enough:
Isn’t this a bug that anybody save the OP gets to see which moderator did the conversion? Why can’t the OP see this?
I mean hey, at nearly 80,000 rep, you’d think Rob has earned that privilege, you know? He shouldn’t have to run to other 10k users to see what they can see. Isn’t 80k trusted enough yet?
(There is something reduplicatively ironic in the answer to Rob’s “Why?” question being waiwai.)