ESPN Article highlights the 21 schools that currently sell beer at on-campus stadiums. The list includes a few Power-5 Conference schools (Syracuse, West. Virginia, Louisville) and one Big Ten School Minnesota.
First hand experience has me thinking that based on what I saw at the soccer match earlier this month... That in theory this should be something on the table at all schools for consideration. Conservatively at the soccer match I would not be surprised if 50,000 (probably many more than this) beers were sold in total at $10 a beer. That would be a good amount of revenue across football, basketball, etc.
I know there are other factors and opinions out there, but from what the old timers post on this blog and from what I know from my parents... Michigan Stadium used to be BYOB.