What are the best conditions for aging the wine? To have natural underground caves from the XVth century or a modern facility with all the knowledge of the XXI st century?
When you visit the barrels room of a modern winery you are told that cool and constant temperature, high humidity, dim light no sound are very important for aging wines so they have a control of all these variables and they spend money for getting these conditions in an artificial way.
And you visit wineries and underground caves that have all these parameters just by chance since 5 centuries ago in a natural way. You know at that moment that the wines are going to be good. And you are wrong. They are superb.