Earlier quoted context omitted.
> real wage growth. Something that's not existed since the 1970s Real wages are 15% higher than they were in 1979 [1]. [1] https://fred.stlouisfed.org/series/LES1252881600Q
That is not hourly earnings. Americans are working longer than they did in 1970. On top of that even if we take your link at face value that's a 0.35% growth per year. The medieval warm period had faster wage growth.
https://taxfoundation.org/data/all/federal/america-has-becom...
(Not my favorite think tank but they have a nice chart.)