yes some of the takes I read were laughable. someone said they had lived in Chicago for 14 years and the Iowa state fans there were more passionate than the illini fans and that they doubt there will be more illini fans than ISU fans in Boston. obviously that person must not get out much. another said Chicago only cares about pro sports and notre dame. as for the fanbase talk, if I'm not mistaken UIUC has one largest alumni bases in the nation. there is no dearth of illini fans and they travel extremely well
Yeah, I have lived in Chicago for four years and the assertion that there are more Notre Dame football fans than Illini football fans is - in my experience - a total myth. However, there are a ton of Notre Dame football fans. BASKETBALL, on the other hand, is a bewildering take to have ... I would wager that less than 25% of Chicago Area Notre Dame football fans cheer for their basketball team, and that might be generous. The Chicago Sun-Times did
a poll last year of its readers' favorite college football team, and Illinois was ahead of Notre Dame (I cannot access the numbers). However, I remember seeing a poll about three years ago by the Tribune that had it at like 32% Illinois, 20% Notre Dame, 10% Northwestern and the rest was other (disproportionately other Big Ten schools, almost certainly).
It's really annoying when people perpetuate the myth that Illinois is not the most popular team here in BOTH sports (and EASILY for basketball), because it's just simply not true, haha.