I have plenty of information on Dior Johnson: there is a medical discharge report, an arrest, and a pending trial with a preliminary hearing. The complaint includes details on the bruising. I know he played for 10 high schools, only one of which closed -- 9 times he transferred. I know he committed to Syracuse and decommitted. And to Oregon then decommitted. He's very unlikely to play for Pitt ever as well.
As to your question, there have been a little over 60 one and done players in NCAA since the rule was instituted I believe. One went to Pitt, and I would have been happy to have someone like him again, sure. But often it doesn't work out that well for them, or their college team, and would prefer they could just go pro. With NIL, I think we're unlikely to get another big time one.