Wow the 1970s were not kind to inflation-adjusted wages.
It's interesting to look at this graph through the lens of demographics & generations. The post-war wage boom from 1949-1963 corresponds almost exactly to when the Silent Generation (those born during the baby-bust years of the Depression & WW2). The peak of the graph in 1973 corresponds to the initial entry of the peak of the Baby Boomers (1955) into the workforce. There's a rise from the 90s onwards corresponding to Gen-Xers entering the workforce (at 22 now, since college degrees have become more prevalent) and the G.I. Gen retiring, but it stalls out in 2005 just as the first Millenials start entering the workforce.
Maybe there's actually something to the Econ 101 models about factors of production and how a relative shortage of labor increases labor's share of national income relative to capital while a glut does the opposite.
HS-educated members of generation after Millenials (born 2001-onwards, and tiny - fertility has been dropping to record lows) start entering the workforce in 2019; college-educated ones in 2023, and the peak of the baby-boomers starts retiring in 2020. Perhaps we'll see another sharp rise in wages in the near future, assuming we don't destroy ourselves because of the coming stock market crash as all the baby boomers try to cash out their 401(k)s at once.