. Many programs that were prominent in the 50's, 60's and 70's didn't cross over into the cable era and ended up left behind in conference reshuffling.
Just curious. Aside from Depaul and St John's who are you referring to that got left behind? Looking through basketball reference over the last 60 years the schools in the 50s 60s and 70s look to be the same as now. Looking at the tournament and conferences the schools that were on top then seem to be the same pretty much as it is now. Who was prominent in the 70s that dropped off? 60s was UCLA and the rest but Dayton is still legit as they were. Name the programs you see that dropped off due to "the cable era"
Quite a few that were squeezed out. You can tell from the AP All Americans where some of the top players once played. 50' Holy Cross, Bradley, Duquesne, San Francisco, Long Island. 52' Dayton, Seattle. 53' Penn, LaSalle, Furman. 57' Columbia. 60' St. Bonaventure. 63' Loyola Chi. NYU. 64' Princeton, Davison. 66' St. Joseph's. 68' Niagara. 69' Detroit, Santa Clara. 71' Jacksonville. 72' Long Beach St, Oral Roberts. 73' Illinois St, American. 74' Canisius. 78' Indiana St, Portland St. 79' Rhode Island. Right here is a list of 30 schools that showed up at least once in those decades (some a few times) with a 1st or 2nd team All American meaning that they had one of the very best players in the entire country.
The past 30 years there weren't too many of these programs with the top players. 88' Bradley. 89' LaSalle. 90' Loyola Marymount. 91' ETSU. 95' UMass. 04' St. Joe's, 08' Davidson. 11' Morehead St. 12' Murray St. 15' Northern Iowa. 18' St. Mary's. Of course I'm excluding FBS schools, Big East and Gonzaga in this analysis but the past 30 years "cable era" produced only 11 AP 1st/2nd teamers from the smaller conferences while from 1950-1980 there was 3 times the. Obviously quite a few historically strong programs didn't make it in the cable era.
BTW, I do consider Dayton a left behind in the A10 as they are not nearly the national power they once were as evidence from the players they sign. I once worked with a guy who picked up his PhD at Bradley years ago. He said he loved the Braves but they can't get the players anymore. It was a program that dropped off the map in the late 80's while others like UC and Temple struck gold with televised college basketball.
Cincinnati had football and they were able to get into CUSA and later the Big East. Dayton at times a more impressive program had to settle for the A10, a conference mostly populated by programs from yesteryear. The AAC is up and coming metro schools plus private schools that kept FBS football. Maintaining a football program regardless of how bad it is was key.