Cheese ripening is done in a very controlled environment and the cheese has te be flipped to make sure it ripes evenly. Furthermore it is protected by the rind, which keeps all the nasty outside or the actual cheese. When you take it home you remove it from the optimal environment and unless you’re buying a whole wheel, you’ve cut the crust and exposed the cheese.
Btw a thousand days is an extremely long time to ripe a cheese. Anything more than twelve months is consider ‘overjarig’ or overyear. The more ripening the more intense and salty the flavour gets.
Source: Am Dutch.
Latest Answers