To answer your question directly, no I don't think so (perhaps some updated theories, but nothing concrete).
But the article does cover more than just the incident, I found the whole thing fairly interesting.
Beyond the passing knowledge I have from growing up in Chicago-land around the time and the Wikipedia article on the subject, I thought it contextualized the FCC policies around the time of the incident and how the hack worked (from a high level). It also pointed out other signal intrusions from the same period and the FCC/FBI's methods to track down the perpetrators.
But the article does cover more than just the incident, I found the whole thing fairly interesting.
Beyond the passing knowledge I have from growing up in Chicago-land around the time and the Wikipedia article on the subject, I thought it contextualized the FCC policies around the time of the incident and how the hack worked (from a high level). It also pointed out other signal intrusions from the same period and the FCC/FBI's methods to track down the perpetrators.