Those charts showing the tendency of different generations to become more conservative as they age are fascinating BUT don’t I think cover one of the big factors; older generations tend to be more conservative partly because the mortality rate is so much lower in the rich compared to the poor.
Or to say it another way, surviving Boomer voting cohorts tend to be very politically Right because some of that cohort has died, and no longer votes. Millennials retaining left-liberal views is partly about improving rates of mortality
