So, question is:
Is there any reason someone would need to start on some track other than track 1?
( and does that apply if you're not using Mobius? )
Good question! I can't imagine why you would want to start on a different track than the first on other loopers than Mobius.
But with Mobius there is one reason: Scripting; you may want to run scripts that fill up several tracks in one go and then your idea of a nice and tidy workspace may call for a different start-out track than #1.