Aye! There's the rub.
What happens when (assuming they were to) they finally find out unequivocally and undeniably, that throwing sliders and/or relievers pitching back to back both damage arms? How can they step back from things so ingrained into the game, and in the former case, traditionally impossibly to enforce even if they had wanted to? That is the interesting thing too, today you could outlaw a pitch like the slider and you could know in real time whether the pitcher tried to throw one and rule it balk. That was never a possibility until very recently but it does open up a whole set of possibilities that may never have previously been considered.