As you say, this discussion was some time ago so I have little recollection of where it was going at that time. I did get that stat from the internet about the last attendance, it may have been for the Rams, I don’t know now.
I know the move of both teams had to do with fan support, perhaps more so for the Raiders than the Rams but it played a part in each.
Living near Oakland during the 80s, Davis move from there to LA was hardly a surprise.
Aside from that, I don’t have much to add to your commentary.
As the numbers show, fan support was a secondary issue. It was much more about stadium revenue. If the fans in SoCal were so bad Al agreed to the Irwindale idea.