How long does wine last?
This is a very interesting question and one that deserves a more in-depth answer. The question is interesting not because of what it asks, but rather what it implies. Wine will last until the seal is broken and the wine is consumed or evaporates, but I assume that the question really is: How long does wine improve and then remain at that "plateau or maturity," as it can be called?
The answer is tricky, since virtually each wine has its own maturation curve, but the short answer is that most wine is ready to drink when it’s released, and may improve for a year or three.
The famous wines of collectors -- Grand Bordeaux, Burgundy, Barolo and the like -- tend to need time in the cellar, say 10 to 20 years, before hitting their plateaus. They then remain there, at or close to peak, for another 10 to 20 years. There are so many variables that it’s tough to supply a satisfactory answer, though when in doubt opt for drinking a wine younger, rather than older. If the wine seems too young, there is always the decanter.