There's even a heuristic to track these kinds of awakenings, roughly, and I'm absolutely certain you're not going to guess it. Got it in your head? Okay, wrong, it was "landmark black cinema." The Wiz came out in 1978 after 4 years of the musical. In 1995, we had The Lion King, followed by the Broadway play in 1997. If you look for something repeating the pattern, you find Black Panther in 2018 (alongside a glamour around a specific component of the web, social media and the mature smartphone).
I don't mean to make any sort of causative connection, but perhaps there is something about a widespread desire to "move forward" and "embrace openness" that also benefits the funding of these sorts of productions (and then the subsequent public enthusiasm for them upon release). And there's always a collapse back to conservatism shortly thereafter (Disco Demolition Day and Reagan; Bush and 9/11; COVID and its backlash, and the subsequent failure of Bernie Sanders to beat Joe Biden, and then Joe Biden/Kamala Harris to beat Donald Trump).
Good point: Timothy Leary was moving in cyberpunkish circles shortly before his death, and my only IRL interaction with John McCarthy was at a cyberdelic-influenced party in a Bay Area tract house.
What a long strange surf it's been.
Lagniappe: https://www.youtube.com/watch?v=LgR6UNeQxXEv
(see also >>41826083 )