I will say this after taking this to a place we occasionally visit which has a long, curving driveway that is best backed down/in to. While the van is great, even with the cameras, it is much more of a chore than our old previa.
I did it at night, and the rear visibility in these conditions is poor. All the touch screens blare light which doesn't help with visibility. The driveway is fairly wide, but tree lined on either side, and the cameras don't do it justice, it's best observed by using mirrors and looking over the shoulders.
I know the previa was a little bit shorter (but the same or more volume, it appears), but had a lot better visibility it seems.
The van is still great in every way, and I think this will be manageable completely and not an issue, but backing down evoked memories, and the previa was much easier, fwiw. I'd bet if I turned off the backup camera, dimmed the interior lights, and removed a headrest or two it would be much better... I'm just a bit surprised by how much more I had to watch and maneuver over the 250 ft or so of curving, sloped downward terrain, when I could back the previa down (or any of our other cars) practically with my eyes closed.