Opinions vary on the issue of how long spirits will last, some claim that air or oxygen will oxidize the spirit and although I am by no means an expert I find strange that whiskey can be stored for 50 years in permeable wood casks that "breathe" air in and out but if you open a bottle it will spoil in months.
Is there not air in the bottle when it is corked?
10 years ago I squired a bottle of JW Blue, poured 3/4 of the bottle out at a party and forgot about it. I recently found that bottle and thought what the heck lets give it a try.
The top end of the cork disintegrated and I used a cork screw to get he bottom out but the scotch was excellent.
Was it as good as when it was first opened who knows.
Oh and by the way this is my first post, Hi ALL.