Minor update: I made Diamond Plus with my last flight out of the US before COVID lockdowns, and haven't gone back/flown since. My wife flew back last week, and said that Asiana sent a "nice" blanket and a luggage tag for reaching D+. I didn't ask for pictures; I want to be surprised.
Could just be a standard OZ blanket, which is fine by me. If it's some sort of branded D+ blanket, how hilariously DYKWIA would it be to use that on flights instead of the one that comes with the seat? Especially in cattle class. Extremely tempted to do it just for the laughs.
I'd be lying if I said I wasn't thirsty for the luggage tag though.
