Hard Rock can currently seat 65K for football. We are 33rd in college football.
A 60,000 seat stadium would put us at 47th, equal with West Virginia, and just behind schools like Mississippi State, North Carolina, Cal, Virginia, Kentucky, Illinois and Oklahoma State (all "state schools").
A 55,000 seat stadium would put us at 52nd, equal with GaTech and Louisville, and just behind schools like Ole Miss, NC State, Arizona, and Arizona State.
Finally, a 50,000 seat stadium would put us at 63rd, equal with K-State and Stanford, and just behind schools like Maryland, Oregon, Colorado, and Indiana.
There are 34 schools bunched between 50K and 65K for seating capacity, including many state schools in large states. We need to give some consideration to the current trends in attendance (declining) and acknowledge that maybe, just maybe, we aren't going to be putting 80K in the stands anymore. This isn't the 1980s. Or 1990s. Or even the "2017 Notre Dame game" any longer.
I'd love to be cheering for my alma mater with 70 or 80 thousand other fans, but I don't think it's gonna happen that way anymore, and I don't think it's an argument for "staying in Hard Rock forever and ever".
Miami is a private school, not a state school. And if we need to rent Hard Rock twice a decade for the UiF game, so be it.