the idea of counterculture being gone was a feature of cyberpunk too though. I've heard the core theme of cyberpunk expressed as 'whither bohemia in a hyperconnected world?'.

There's not really a mainstream culture now. Even the biggest consent-manufactories like the 'mainstream media' are actually a minority in an overall fragmented and dissenting pseudoculture that's becoming more like an ecosystem than an expanding monoculture. What would have been 'the dominant culture' in the civil rights era, the domain of the Cronkites of that era, is now just another minority, perhaps the largest single minority but still distrusted or ignored by the majority.