Compare that list to WCC, MWC, MVC, A-10... its just a non-sensical argument. Gonzaga, SD St, Wichita State, VCU all have remained really good programs for awhile now.
The Big 10 seems to be making a serious effort to drive everyone except P5 schools out of D-1 by making it too expensive to compete.
Ending freshmen eligibility, with a caveat that kids can have 5 years to play 4, will increase player expenses because coaches are not going to accept a smaller roster. I'd expect increasing basketball scholarships to at least 15 total and maybe more.
Sports Illustrated published an article in August 2014 which predicted that D-1 woud be reduced to solely P5 schools within less than 25 years. It could be faster. They mockingly said the NCAAT would be renamed the Slive-Delany March Madness Cup, because the P5 schools are intentionally squeezing out everyone else.
A school like UConn will really be in a vise , because they have the expenses of D-1 football, with basically, mid-majer TV contract revenues. For many athletic programs, the choices will be 1) Get into a P5 conference or 2) drop to D2/3.
The Big East schools are probably better off because they don't have to pay for 85 football scholarships. Or share their TV bounty with as many conference members.
To be honest, probably 2/3 of the schools in D-1 basketball are there for publicity and for their share of the billions CBS pays for the NCAAT. If EVERYBODY has to lay out $10,000 extra for every basketball player in stipends and NIL trusts, there is a strong chance that a large number of the 351 or however many schools currently playing D-1 drop to D2 or D3 quickly.
Bottom line is, the days when small private mid-majors can make an impact in big time basketball on a regular basis is probably disappearing.
The corollary to that is that the poorer P5 schools will become the next "distressed properties" or poor relatives. We're never going to be able to keep up with the 'Bama's and tOSU's.