The short scene where they are in the "computer room" and the operator mentions that they lost the entire history of 14th century painting, or something like that. So relevant to contemporary memory holes and wholesale data losses.
"Logan's Run" is similar, but with the idea pushed further. I think Rollerball is more political in specifically targetting corporations as being malignant forces.
I’ve been trying to get some of my younger colleagues to give both movies a chance without success so far. I think they find it tough to get past the practical effects and old school actor acting.