"what benefits is OP seeing here when it comes to pizzabox"

I'm more learning and questioning than stating. I've thoroughly enjoyed the thread.

One of the main advantages I saw from the outset was that I could start with a single box and then grow if needed. Other than recabling, if not planned for accordingly, it seems like I can still do that. You would have an increased cost once you had to add a fabric box, but you've already had some amount of scale to get there. With a chassis system, you have the larger cost up front before you even know how you're going to scale. It's more difficult to plan what sized solution and no matter what you do, you'll probably pick the wrong one.