Several times during my lifetime, bottles of wine with some great age on them have been opened with a lot of publicity and hoopla. To my knowledge, not one was drinkable.
In one of the links above, maybe the source story, there's a woeful tale of a bottle of wine valued at $100s of $1000s, and the would-be seller accidentally knocked it over onto the floor. Gone. Another problem that started to get larger during the uptick in baby boomer wine collecting was fakes.
OTOH, the head of the Rothschild family recounted (on 60 minutes, maybe?) how he'd been dining, in Scotland of all places, and ordered the house wine, and one sip, it was the best wine he'd ever tasted. What is this wine? Just our house wine. It was a 200 or so year old Rothschild, apparently this was a posh place.