I'll be honest, I don't find Hollinger that valuable. When The Athletic hired him, I was really excited because I thought he was going to incorporate the stuff that he learned or that he was exposed to while being a part of the Grizzlies FO. I listened to a few pods with him and read his columns....and basically nothing changed from his old stuff.
My biggest problem with him is that he comes off, to me, like he thinks he is much smarter and above your normal basketball analyst. Yet, when it comes down to it, his contributions are basically plugging numbers into his models and slavishly following whatever they say. I've always got the sense that he doesn't actually watch much basketball (which is crazy because I know he does but that's always the impression that I've got).
It's very impressive that he created PER and that he got hired by an NBA team...however, in sports media years, that was a long damn time ago. I think other people have passed him by, whether it be on a pure numbers basis (Cleaning the Glass, DARKO, etc) or by analysts who can effectively blend the scouting and numbers side together (Zach Lowe, JJ Redick, etc)