Wine drinker here.
My mother passed away and I'm cleaning out her liquor cabinets. There is a sealed bottle of Glenmark Blended Scotch Whiskey that may be 30 years old.
Is this likely to be drinkable? It's been kept in the dark, it's still in the box (cardboard) that it came in, but I don't think it was very expensive to begin with.
I've had to dump many bottles of red wine past their prime, and it hasn't been a pleasant experience.