I think prime is simply a display of consistency in execution with consideration to level of competition. Tested and rebounding to display the same, be it from a loss or a perceived loss. Being young and knocking out cans is not a prime. Possibly physical but def not mental prime and condition as you've never had to expand and adapt. Its definitely different for each fighter as far as experience, life style and the fact we are all living to be older. A lot of young guys come out now with massive 'push' and are force fed, we have a microwave mentality and I seriously think a stable foundation is sacrificed now in the name of expected stardom and many a decent fighter short change themselves in the long run. Prime should be an investment.