I think cheese is good for as long as you want to keep it. "Aged" as long as its kept at proper temps, and you scrape the mold off first
but I love cheddar and the best way I have found to keep it fresh longer is using the handi vac. I used to use my regular food saver, but those bags are an expensive item to be cutting and resealing constantly. The ziplock handi vac bags are great. I think it's something that I may even include in my B.O.B because you use the same bags over and over. And the portability factor thumbs up. I unzip the bag cut off a hunk of cheese, zip the bag up, 10 second vacuum, back in fridge, Voila no mold!!