Per Jay Helfert:
"Richie [Florence] was an innovator. Against my objections (I was his TD), he went to Texas Express rules for the televised Caesar's events. He was looking for a way to speed up the game. A typical Race To Eleven used to take an hour and a half to two hours. The new rules cut that down 15-30 minutes.
Texas Express rules were first formulated by John McChesney, Robin Adair and Randy G. who posts on here. They used them for the Texas Express 9-Ball Tour in the early 80's. It was a major changeover from the old "Push Out" 9-Ball.
The big differences with the new rules, you must make a legal shot or it is a foul and the opponent gets ball in hand. Any balls made on a foul, stay down. With the old rules, you could "roll out" at any time, and your opponent had the option to shoot or pass back to you. If you fouled on your second stroke, your opponent got ball in hand behind the line. There was no ball in hand anywhere on the table.
All balls made on a foul would respot, and the incoming player shot from behind the line. So, all balls came back up and the incoming player shot from behind the line. He could also pass this shot back to the player who had fouled, and make him shoot at the respotted balls.
Thus you had to shoot many spot shots. It was a like a free throw in basketball. A good player could make it 9 out of 10 times. The game took longer and the better player had more of an advantage, due to the fact that more decisions had to be made. And more tough shots had to be shot as well. That's it in a nutshell."
Old School Roll-Out v/s.Texas Express 9 ball
Many players differ in opinion as to which style was best for pool gambling..Most of the old timers.. even in todays times.. would much rather play roll out than Texas Express style 9b..
This is a question for Jay or Freddie:In Richie Florence's Tournaments in the 80's (at the stardust?) was it roll out 9ball played in them?..I can't recall...
One more question..I've always heard talk about Denny Searcy but never saw him play..was he THAT good or what?

Check out entire thread for an OG perspective on the subject. Plus, search AZB for more.
The really interesting thing, to me, is that a well-established game of pool, with many devoted followers, was scrapped to satisfy television's need for regulating time/game length. 9 Ball Roll/Push Out's fate provides an excellent cautionary tale for DCC, and others, whenever they begin to consider any 1P monkey business. Long, hard consideration of the effect on the game as a whole must be brought to bear -- the entire nature of a game can be changed in an instant in the interest of convenience and expediency. And once expressed from the tube . . .
What is sauce for a goose is not necessarily sauce for the gander.