There is nothing particularly new about getting past the ball, and controlling the space beyond it.
Exactly right. I have mentioned several times that I spent about 8 years in NZ during my high school and Uni years. At high school we were told to step over the ball and keep going; stopping at the ball was the sin of a beginner or a wuss. Of course, the other mob were trying to do the same. When defenders did this half a century later they were to call it counter-rucking.
That was in the ancient time when when players stayed on their feet to push the other side back because hands in the ruck, even by the attacking scrummie, was pinged as if it was in the laws. Of course it was, and still is. Going to ground to protect the ball was plain cheating, like pulling down a maul is now, and offenders got condign punishment from the referee after opponents had finished with them.
That was one of the ways that the All Blacks of the time had it over opponents and though it was always in the armoury of the men in black, the change to the tackled ball law over 50 years ago saw forwards using their hands more at the breakdown before the ruck was formed. To do so players had to stop at the ball and naturally sometimes they couldn't; therefore they started going off their feet and ended up on the wrong side of the pill. If they got away with it, it was the right side.
The days of the ruck moving up the field, ball at the feet like in a loose scrummage, as Craven called it, ended, though a new manoeuvre with the ball up came into vogue. It was called a "maul" and had hitherto been illegal.
Instead of deterring players going to ground referees dealt with this new kind of log jam ruck, by allowing attacking scrummies to put their hands into it to fish the ball out, because it wasn't coming out with feet. Once referees started down that path they changed the game, thinking they were doing the right thing by it.
The age of the specialist fetcher using hands at the breakdown arrived, like a new creature evolving under favourable changes to his environment. Further down the track and notably in the professional era, tacklers started twisting themselves around in the act of tackling so their bodies fell between the ball and opponents. They weren't punished: they hadn't done anything wrong after they hit the ground.
In the last 20 years there were various attempts to keep players on feet, and the several other abominations that branched out from that, but most solutions failed. Nobody was surprised: referees couldn't even get scrummies to throw the ball into the scrum straight.
Going back up the path the game had gone down was difficult so about 6 years ago lawmakers sidestepped to a new path by trying out several revolutionary ELVs. The important one, the free kick sanction for most infractions, failed, because professional referees were too shy to use yellow cards, whereas the amateur refs had not been in earlier trials, which were successful.
Darkness came upon the land; various guidelines were issued without effect, then, to save the kingdom, a comprehensive crackdown on the laws was issued to all the refereeing Frodos. Players were indeed to stay on feet and not kill the ball; they had to support their own weight and yarda, yarda.
I shook my head when hearing this but against the odds the referees took the directive seriously. In Stage II, this year, they even escalated pinging tacklers for falling in the wrong place if they thought it could have been avoided during the act of tackling. If this odd compliance by referees to directives continued, and they even sanctioned the underlying causes of infringements, the fabric of game would change; so the ever pragmatic Kiwis went back to their roots.
Counter-rucking, the old, old practice, had already been taken out of the armoury in the pro era. The law crackdown accelerated its use and revealed its natural progression to pushing past the ball into opponents space. So long as players remained bound this was not a problem; when they become detached from opponents on the other side of the ruck, it was. We are currently watching this space to see if another side path to a dark place is being travelled on.
Australian players at all levels stop at the ball too much; they have to go past it and to do that they have to go in low and push up to stop opponents killing the ball. Players outside of the tight five should learn some srummaging techniques for the counter-ruck; even the pretty ones.
.