Did he say why he thought you should retire the old one? Because if it works and you like it, then as long as its in good shape i would see no reason to retire it. Some people are knife snobs and think that anything not custom or supersteel or priced over x amount of dollars can't be a good knife. But some of the best using knives you can find are opinels (folding) or moras (fixed) which cost less then fifteen bucks. Not that there is any problem with expensive custom supersteel knives, but you must examine what you plan on using the knife for, versus what you can afford, and then trying to find the best knife for that use that still fits in your budget.