Quote: Khlav Kalash "Below armpit, is that such a big deal?'"
It's not the concept, it's the implementation.
At speed and from distance, pretty hard for any ref to define below the armpit, or whether it's purely accidental, or due to the player falling into the tackle. It's another one of those rules that are far too subjective, and I think it will kill the spectacle for a while until someone finally realises it can't be done.