In the mid-20th century, independent films were about
& juvenile delinquents.
Today, it's still pretty much the same, but not exactly.
In the 21st century,
it's about niches and micro-niches.
Action / skin / teenagers / juvenile delinquents catered to niches and micro-niches, yes.
That's why exploitation cinema was a fringe industry.
But today, it's not about catering to this (or any) particular niche.
Today it's about the niche in general - about niches and micro-niches of all kinds.