Well folks don't get confused or upset when you see this new phenomenon, it's the wave of the future. I have never been able to find out the reason cork was first used to seal a bottle of wine and for the most part why. Yes tradition is a wonderful thing, but cork in a wine bottle does have its disadvantages. The first that comes to mind is the fact it is a natural organism that can contract or expand due to temperature fluctuations. This can cause the cork to get moldy and taint the flavor of the wine or the bottle may leak.
Cork is one of the main reasons for a bottle of wine to be musty.
Now if you are a collector this is your biggest fear and that is why you have a temperature-regulated cellar. Cork is also becoming very expensive. If you open an expensive bottle of wine you will see a long beautiful cork stamped with the vineyards logo. As the price of the wine gets less expensive the length of the cork decreases. Some vineyards have decided to be trailblazers with the new synthetic corks.