[Rock]

A couple of decades ago I had a small collection of Penfolds Grange Hermitage, generally regarded as Australia's best red wine and comparable to the best produced anywhere.
Properly cellared, these wines will be drinking well at 50 years. My cellaring was somewhat indifferent and I drank most of them at 25 years to ensure they were "in the window".
I kept a few to 30 years and two of six were vinegar. I sold the remaining ones for almost 20 times what I paid for them. Hopefully great wines have great corks but 40 years is a big ask for a cork and anything over 20 years needs a regular cork-check.