On conditions with enough friction, up until the beginning of last year, I had an original Forest Green Quantum and a Midnight Blue Quantum. Both balls came out January 1994...making them 21 years old when I finally retired them last year. I used the Midnight Blue in a tournament in 2014 exclusively on a short light pattern and shot 300 the final game of the tourney to win by 12 sticks. If I would have tried to force something newer, the cover probably would have been too aggressive and I would have never sniffed the victory.
As the previous poster said, new does not mean better. Old stuff still has a place on the correct condition (just like urethane does).
Good luck to you!