I can't really back it up with any sources but that counter culture really hasn't died out and is arguably, even stronger today than it was back in the 60's and 70's. There are still massive music festivals like Bonnaroo, Coachella, the Rainbow Gatherings and Burning Man, that attract a huge cult following every year. The whole idea of transient vagabond lifestyle has gone passed just being a hippie thing. Now and days it seems to be even more popular with "crust"/"folk" punk kids, who glamorize riding the train tracks, living in squat houses and moving around the country. The Beat writers like Jack Kerouac and Allen Ginsberg are more popular than ever with the millennial generation and it doesn't seem to be going anywhere soon. I don't have a source, but another good argument could be made that the current young millennial generation has far more in common with their grandparents, the Greatest generation than they do with their Baby Boomer parents. Living in tent cities, moving around the country to find work and stretching resources to make ends meet is way more a part of life for them now than it was for young people in the 60's and 70's.