I put this in the lounge because it might become loungy soon (no pun intended)
Bench seats are better than AL7s because the driver seat'* extension also double as a table/tray/playing surface
Bench seats are better than AL7s because you can fit three across
Bench seats are better than AL7s for ease of driver swaps without stopping
Bench seats also double as beds (which AL7s can do)
I'm sure others will come up with more creative ideas for bench seats!