I am a baby boomer, I’m 54. The baby boomer generation extends until those born in 1964 I believe.
Also, the article notes that this trend started in 1990, when those baby boomers now in their 70s were in their 50s.
The hippies of the 1960s are baby boomers.
No boomers have reached 70, and the 1960s was mostly the creation and operation of the ‘silent generation’ (1925-1945) with many young boomers joining them as youth to hear their music and go to their festivals and concerts, and to buy their drugs.
In 1966 boomers ranged from age 2 years old to 20 years old.
The people we know from the hippies were almost all ‘silent generation’ people. People like, Bob Seger, Jane Fonda, John Denver, Jim Morrison, Jimi Hendrix, Peter Paul & Mary, Grace Slick, Neil Young , Beatles, Van Morrison, Joan Baez, Jerry Garcia, Pete Townsend, Joe Cocker, Judy Collins, Jimmy Page, Janis Joplin, Bob Dylan, Williams Ayers, Bernadette Dohrn, Chicago Seven, Rod Stewart, Abbie Hoffman, Hunter S. Thompson, Malcom X, Charles Manson, Brian Wilson, The Beatles, and the Rolling Stones, the Jefferson Airplane, and the Mamas and the Papas, Jimmy Page, Crosby, Stills, Nash and Young, etc, etc, etc, just about everyone that you can name.