I would prefer to have no blockage between the front seats, or in the foot-space. A flat floor with no "bridge" (to allow leg stretching), and more "friendly" (less isolated) seating would be nice.
And for back-seats:
In my mid-50's Citroen (looked like a car style from the 20's, like the French Police Inspector drove in old movies), one could sit in the back seat and stretch out one's legs, and not (or barely) touch the front seats. Now that was comfort!
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