I could be mistaken, but I think players generally play a lot more tournaments than say the 80's? There's all this travel to the far east as well.
I'm trying to look for reasons to this inconsistency, and I think -like most sports today- it's too many matches (they literally finished the Masters and 2 days after I'm seeing scores from some other tournament).
I could be totally wrong, to me as an observation (based on no stats etc, just looking at it) that the pace seems quicker, the game itself seems quicker, less snookers, more about a shootout, players are burnt out.
I could be wrong, but the whole 'snooker loopy' world seemed a lot slower/simpler.
Now of course Ronnie is traveling and doing all those things AND excelling, but he's an outlier, a once in a lifetime, just gifted with an X factor. Whereas you can see the less super human players shine in a tournament and then disappear for a stretch.