I only tried wet aging a brisket once and it was a 50$ prime brisket. Spent a month and in the bottom drawer of the beer fridge.
I knew something was up when the cryovac was bulging with air, opened it and proceeded to gag.( must of had a pinhole leak)
Tossed that puppy in the trash.
I've done 4 months past the use by date on a vac sealed flat from BJ's. Let me tell you it tasted fine. Mr. Kruger and I emailed back and forth about wether it would be good or not before opening the cryo vac. We both agreed that it should be ok. Just remember one thing, your nose will tell you if it is good or not. When I opened it, and smelled it, it smelled just fine. Now mind you it was kept in my beer fridge which runs between 30-32 degrees. I have one in the fridge as I type this that is 1.5 months past the use by date.