That would require an in-depth analysis. I'll write one up at some point. In short, setting them in modern day might lead to misrepresenting real character struggles that were way more prevalent in the 60s-90s. It would be a controversial, toxic, and divisive film. You might run the risk or erasing or misrepresenting lived experiences of real marginalized people. Today’s audiences want more honest, specific, and inclusive storytelling, not just metaphors that skate around hard truths. Setting it in the 80s core themes of prejudice, identity, and social conflict would be more effective and would have a better chance to be well received. Again, just an opinion,