Again i will repeat that s+v is nowhere near as tiring as baseline bashing. Someone said that s+v is like sprints, that is not true. If you are sprinting to the net you are out of control. Any of the good net players i know sneak into the net, they dont sprint in.
Again YOU can't speak for everyone. It's more tiring for me. It's more tiring for other posters. The act of running towards the net - the split stepping - then running down the inevitable lob (which is what th low level players see 90% of the time) is MUCH more tiring then take a few steps to your left or right and then recovering. In fact some players use that strategy. They hit short shots - make people run in and then hit lobs over their head. Even if they lose the point the other guy eventually wears out. If your S and V your doing much of the work for this player. They don't need the short shots..
At the pro level sure - you might be onto something.. It might be less tiring but it's also not that effective.
Pete