For most of the wine that we now drink, why would we want anything other than screw tops? Some wine is sold in the knowledge that it will not be at its best until it has laid around for years, gently breathing through its cork, and slowly maturing. But winemaking standards are now so high that winemakers are saying here is my wine, it's fab, buy it, unscrew it, drink it, enjoy it. Why do you want sone cruddy old piece of bark wedged into the top of the bottle?