I believe that this analogy can be used with Michael Anthony also. When a guy starts looking for a classic Corvette, he usually wants to find one with all the original parts. Aftermarket parts tend to decrease the value for most buyers. Regardless if Wolfie is Eddie's son or Sammy is a good singer (which I realize is debatable around here), they are both "aftermarket parts" being installed on a classic vehicle.
Wolfgang was born in 1991. Van Halen was born in 1974. How many of you would prefer a 1974 Corvette with a 1991 GM 350 aftermarket engine over a 1974 Corvette with the original stock 1974 350 engine? For some people who are not classic car buffs, they may not care. But for the Corvette aficionados out there, it makes all the difference in the world. Likewise, some people could care less who plays bass for Van Halen, or for that matter, who even sings for Van Halen. But for us Classic Van Halen aficionados out there, it makes all the difference in the world.
