Did anybody Leave Chicago ever since Lori Lightfoot became mayor?

I left when "9.5 fingers" was still a mayor, about 6-7 months before Beetlejuice got elected. 

Of course.  People move in and out all the time.

The city has been losing population for several decades.  Some reasons are:

- White (and middle class Black and Asian) flight

- Disgust with endemic city/county/state corruption

- High taxes

- Crime in some neighborhoods

- Loss of job opportunities

- Deteriorating public services

- Too many lousy public schools (maybe due to lousy quality of students)

YO OMG

this was the first question in the chicago section in TWO WEEKS