Being a Floyd fanboi there are many "what if" scenarios associated with that band that could have alternative outcomes which possibly could have had far-reaching consequences.
What if Syd Barrett had not gone off the rails?
What if David Gilmour had not joined the band?
What if they had recruited Jeff Beck instead of David Gilmour?
What if Dark Side of the Moon hadn't been so successful?
What if Roger Waters hadn't thrown a paddy in Montreal?
What if their accountants hadn't screwed up their tax returns?
What if Pink Floyd picked-up Roger Water's Pros and Cons idea instead of his Wall concept?
What if Roger Waters wasn't fixated on the War, his mother and his loss of his father at Anzio?
What if music in The Wall was Progressive Rock, or at least changed key, temp or chord progressions.
What if Richard Wright and David Gilmour had contributed more to the music?
What if Roger Waters hadn't "sacked" Richard Wright?
What if The Final Cut never existed?
What if Roger Waters hadn't fallen out with David Gilmour?
What if A Momentary Lapse of Reason had been a Gilmour/Waters/Wright/Mason album?
What if Syd Barrett and Richard Wright were still alive today?