I loved the space of my 50 qt ARB, but one thing I found was that it was hard to use all the vertical space. If something falls to the bottom when it's mostly full, it's real hard to get past 3 layers of cans to get to it. That made the first day of multi-day trips pretty annoying. "Ah crap, I dropped the gogurt. Hang on while I take out 6 beers, 4 sodas, the grapes and a couple waters so I can reach the bottom..."
I'll have to live with a 30 qt to see if it's worth it. Another consideration is that my family normally has at least one small cooler kept up front where we can access it for soda/snacks on the move. Maybe between a small soft cooler and the 30 qt drawer that would cover everything for a couple days.
The 30 qt fridges are still smaller than needed to fit under the SS1. If somebody made a slightly taller and deeper unit we'd be in business (figuratively and literally). The space is there, the common dimensions just aren't quite the right orientation.
A pictoral example from CAD:
Typical 30 qt fridge actual product volume: ~80 liters
Space under one side of the SS1: 150 liters
ARB 50 qt product volume: 115 liters
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