Scarily enough, I bet every generation since Gen-X has been largely raised by Boomers: Gen-X and Milennials largely had boomer parents. Many kids in the later generations are effectively being raised by their (Boomer) grandparents because their parents are either not involved or absent because working too hard.

For most of my 13 year old kid's friends, I only know their grandparents. Never see the actual parents.