Interesting if an open stance really can cover as much court as a crossover step.
For groundies, you hit open stance forehand on wide balls, but not on running forehands where you go for all or nothing.
But on a volley, you seldom have the TIME to choose whether it's wide, or really wide.
Either way, an openstanced volley is a more advanced volley, one that allows you to recover back to center of intersect just a second earlier than the typical old school closed stance volley.
WHERE you volley is more important than HOW you volley, it seems.