> I think Detroit is well past its “bottom”.

Agreed. My family's from Detroit. Like so many others, they left in the mid-70s because Detroit had become unfathomably bad - the job market was shit, crime and corruption was out of control, and there was no hope for things turning around. In the mid-80s, there were countless jokes about Detroit, like this: https://www.youtube.com/shorts/iFxyAA0l0nU