Last time I was Op-Uped was in mid-2021 for a MRS-AMS flight. During the BP scan at gate, the agent smiled at me "Oh! you are very lucky Sir, you have been upgraded and will enjoy all the benefits of the business class."
Arriving at my seat, the FA: "Sir, unfortunately your meal has not been loaded due to last minute change".

The plane was a CRJ1000.
Then I thought again about the gate agent