Winemakers around the world have tools and strategies today that they never had decades ago that help to make wine a lot more stable than it ever was back then.
Unless a bottle of wine has been held under horrible conditions, especially excessive heat or temperatures that vary up and down, most of the time we can rely on the fact that the wine will be technically sound and drinkable.
However, there are several issues here that regular wine in consumers need to know about, in particular because the quality of a particular wine does depend, to a great degree, on what it is….