One thing is that 10th percentile wages did barely keep up with inflation from 1979-2019 (0.1% growth annualized), it's only since then that it showed an increase (3.1% annualized).

So it seems to me that any effects along those lines strong enough to exactly negate the apparent real wage growth in recent years must have either 1) been basically constant, so effective wages in this group actually declined 3.1% every year on average for forty years, making 2019 10th-percentile workers reduced to 28.4% of their forbears' wages, or 2) the inflation numbers were about representative for the 10th percentile worker from 1979-2019 and then suddenly and abruptly weren't, or 3) some combination of the two.

(or of course 4), the effect is real, nonzero, but not big enough to wipe out 3.1% apparent wage growth)