Aging for whiskey and scotch is done in specialized wood barrels with specific environmental conditions, not in the bottle.

If they’ve been opened for a long time, it’s always possible some evaporation, or other slight changes have occurred that may impact taste, but still perfectly safe. Assuming it’s 80 proof and up.

Any hard liquor should be safe, even if it taste is degraded.

Throw out open wines if you’re not comfortable determining if they’re still consumable and not spoiled.