I know I'm speaking from a rather (somewhat) privileged position. I myself don't consider working beyond 50 years of age. I have lived frugally/minimally and am confident that (unless WW3 happens or some sort of unexpected global catastrophe arrives) I can FIRE (retire frugally with my savings) before I hit 50.
I also know it's somewhat of a bubble, but Reddit has a lot of subreddits (like r/HENRYfinance/; r/Fire/; and r/coastFIRE/) dedicated for folks retiring early.
Observing that FIRE trend and the fact that AI psychosis (don't get me wrong, I believe AI is useful, but not to a level that humans will be entirely replaced) at work place will surely drive some folks away (or at least discourage them) from staying in the work force, I am not surprised that this trend is showing up in the data. Plus, a lot of millennials are child free (by choice), so they can afford to retire early as well.