Interesting concept
The configurability is good because currently, we must buy the vehicle that meets our largest need, even if we rarely use the capability. Occasionally need to carry 7 passengers? Then a small CUV won't do, you have to have a full size crossover, even if you only carry those 7 a few times per year. The addresses that issue. But I'd have to say that many moving parts in the structure sounds like a recipe for rattles!
I would still rather drive it myself.