I just started the same yeast from a 1/4" cake stored under sterile (boiled) water that was 25 months old. It even spent a short time when the fridge failed. I put it into a growler of leftover wort 1.059SG. It took about 36 hrs, and took off. I just racked to a secondary after 4 days to clean it up. We will see if the taste profile is correct, but I suspect it will be fine.