Turns out that a screw cap is not indicator of wine quality. Winemakers use it to control problems that can come from corks. 1) Bad Corks can taint wine and make it smell musty. It won’t hurt you, but it’s unpleasant. They say this affects up to 5% of bottles. 2) Oxygen interacts with wine and changes it in the bottle. Which is good up to a point, but too much sends a wine over the edge. Corks are porous and less predictable. Screw caps are quite stable, and the latest technology controls the amount of oxygen that gets in. The jury is still out on aging wine: perhaps more controlled with screw caps, but also less…interesting? Now that the market has gotten over the quality issue – the real debate is around tradition. And there is something about that satisfying ‘pop’! Looks like they’ll both be around for awhile.