Quoted from Elvishasleft:Easy to not age when you have made millions upon millions for just showing up and playing the bass.
The Van Halen bros came to the same conclusion and cut his percentage at least twice. He was always just OK on bass, but from what I've read his biggest contribution (maybe the only significant contribution other than being a team player and a good guy) was his background vocals. Eddie was the best bassist in the band and usually did 2-3 tunes on the albums playing bass himself, per Sammy.