You disagree that the full stop split step exists or that it's not optimal? It does exist but perhaps it's not optimal.
Look at my split:
That's pretty much a full stop: very little forward momentum. Could I have been more aggressive? Certainly.
@fuzz nation @Curious: if you single frame through this video ["." is forward; ";" is backward], you'll see that I actually did a cross-behind step, if ever so slight, on my follow-through]. And notice the return jammed me a bit so I had to move out of the way to volley.
Then maybe it's just a matter of semantics: for me, the split step is to prepare myself to move dynamically and to start from a balanced posture. Initiation of the movement towards the ball comes after I land.
I do too. Always be ready because it's eventually going to come to me.