Another big difference is that radicalism in the 1960s was mostly economic. These days its mostly cultural. My favorite comment on all of this comes from a liberal/leftist who wrote (bitterly lamented)

“We are going to hear a lot more about ‘transgender rights’ in the years to come, than the minimum wage”

He was correct of course. The traditional left cared (a lot) about things like the minimum wage. The culture war left could care less. The Google Ngram viewer confirms these trends. References to the "minimum wage" peaked before 1940. References to "transgender" took off after 2000 and are now twice as high as references to the "minimum wage".

The other big shift is reality is no longer held as some sort of ultimate standard I attribute this to Post Modernism (Focault, Derrida, etc).