Bonjour,
I was thinking of a thread like this. I am from the last 70's, nearly 40 years old, this could explain that

The sixties
in France are my parents' and in-laws' childhoods.
- My mother, and her older and younger siblings (eight together), grown up first in the French African colonies, then (decolonisation) in the "Old France". Strict education; radio, no TV.
My grandfather was an officer of the French marines and my grandmother followed him.
- My father, the same age as my mother, is the first of three siblings. Post-war family; my grandparents were only children, and my grandfather was even not in the Algerian war.
Both my grandparents started working after school when 14 years old. After living in an old house, they bought a brand new one. TV, car, modern life, the beginning of today's.
But, my great-grandfather (who fought World War II, and was in a prisoner camp) a team leader in public road department (a quite comfortable position), left the family, living in worker or homeless residences

My in-laws report that in village festivities it was common to see major incidents with guns

An aunt of my wife relates that since the French rocker
Johnny Hallyday died in 2017, her adolescence
(teenagehood ?) is over.
See also, much more related to music :
https://forum.wordreference.com/threads/what-do-the-sixties-mean-for-you.1814270/