Ive walked out with multiple free upgrades over the years when my phone died. Once even after they told me that wasn’t possible. I keep it friendly even when I get the answer I don’t want, and I think that helps.

This past summer when I ordered my MBP I asked for it to be delivered early, was told it wasn’t possible after they reached out to FedEx. I did in fact get my delivery a few hours later tho! Idk if that was just coincidence or not but it wasn’t scheduled to be delivered for four days and it didn’t say “out for delivery” at any point.