After opening a bottle of wine that has been refrigerated, it does not necessarily need to be refrigerated again. This is not an old wives' tale, but rather a common misconception. Whether or not you should refrigerate the opened bottle of wine again depends on the type of wine and how soon you plan to consume it.
For white wines and rosés, which are typically served chilled, you may want to keep the bottle in the refrigerator to maintain the desired temperature. However, if you prefer these wines at a slightly warmer temperature, you can take the bottle out of the fridge and let it sit at room temperature for a while before serving.
On the other hand, red wines are generally served at room temperature. So, if you have opened a bottle of red wine that was previously refrigerated, you can leave it at room temperature or place it back in the fridge if you prefer it slightly chilled.
The key is to consider your preference and the timeline for consumption. If you plan to finish the wine within a day or two, leaving it at room temperature should be fine. If you think it might take longer to finish the bottle, refrigerating it can help preserve the quality for a few more days.
Additionally, if the wine you're dealing with is a sparkling wine like Champagne, Prosecco, or Cava, it's best to keep it refrigerated and use a wine stopper to help maintain the fizziness.
In summary, the decision to refrigerate an opened bottle of wine again or not depends on your taste preferences and how soon you plan to drink it.