Something tonight reminded me of an old Twitter rant (sorry, no citation—I am *not* logging in) to the effect of “GenX is middle aged now. Your 50-something asshole landlord is Generation X, not a Boomer."
I believe the OP's point was about our stereotypes of generations becoming ossified, but I also recall some people taking it as "It’s not just boomers—all the olds are bad!”
But Millennials aren't magic. In another ten years or so, they will be 50-something asshole landlords, too.