Hmmm wouldn't say they necessarily "fell off". The same thing happened to the Outfit that happened to every other American Mafia family. There aren't as many Italians in Chicago & Philadelphia as there are in NY, so the numbers will naturally make it look like Chicago & Philly have been hit harder, but the Italian American population, not to mention culture, has assimilated itself within those cities & is shrinking rapidly (has been for a long time). Italian American organized crime will naturally follow suit.

The idea that the Outfit is this gasping typewriter factory that is barely keeping it's head above water, and which consists of a few old bastards making the poker machine rounds, is laughable though. The Outfit is an institution & still a viable, feared criminal entity. Not what it used to be but still in place, and still keeping youngsters in the ranks.