Indigenous peoples and minorities of all ages have been infantikized and denied agency and rights, so the playbook seems very similar to me. In general, I believe the goal (or the trend, rather) is to deny agency to anyone who doesn't belong to the owner class, so their lives can be controlled economically and with violence, like many children's are.

I could legit see boomer establishment dems wanting to raise the voting age to 40 or 50

It’s the most extreme example but you need to be 35 to run for president, when I’d trust a random 25 year old over a random 75 year old any day of the week