Left High Quality Vacuum Sealed Cheese In An Open Fridge For 8 Hours: Is It Safe To Be Eating?

It's difficult to say for certain without knowing more information about the cheese and its storage conditions, but in general, leaving a vacuum-sealed cheese out in an open fridge for 8 hours is not ideal. When cheese is exposed to air and warmer temperatures, it can start to spoil and develop harmful bacteria. That being said, the fact that you ate it over the course of a month without getting sick suggests that it may be still safe to eat. However, to be on the safe side, I would not continue to eat the cheese after this point, especially if you notice any signs of spoilage such as mold, bad smells, or an off flavor. In the future, it's best to store cheese properly in the fridge at the correct temperature, ideally in an airtight container or wrapped tightly in foil, to help prevent spoilage and maintain its quality.