I don't think the rallypack was actually 'canned', or at least by no means like the LX8 was, the LX8 was actually made, worked etc. It was just canned because of its extremities.
Rallypack Scavier stated would be made if they had time etc. (I believe), if not it was something along those lines, Scawen (or was it Victor?) kinda hinted at one, but nothing was official about actually making one 100%, they just made it sound like a little fun side thing they could've done just to keep stuff moving along.
Change of pace is always nice, hence why I never really finish many 3d models just because after a while it's the same tedius work over and over again.