system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How long can whiskey age until it reaches a point that it will no longer change flavour as it ages.

As spirits like whiskey age the flavour changes, if you were keep aging a barrel of something like whiskey how long would it take for it to no longer change while aging, or does it never stop changing?
gpt
I don't think it would ever completely stop. It will extract less and less flavor from the barrel over time, but you also lose around 2% to evaporation every year, which will affect the concentration of the flavors.