Good chart. But 401K performance, if not mis-managed, should be a net of 3% after inflation. Pay should be close to, or slightly above, inflation.
So one line is a pre inflation line and one is a post (net of) inflation line.

And the pay chart shows a gain of $6 million in the last 8 yrs that equals $750,000 a year. There's a couple guys in the industry making that. IMO $400K-500K, and perhaps $600K, would be a more realistic end of career estimate.