where do you shop to have 8-9 foot aisles?
Hy-Vee has space for 2 carts wide. It's just that it used to be that you had carts going both ways so you can't pass someone. Now with 1 way, there's room for carts to pass another.
Walmart has room for 2 standard carts wide to do the same. Passing the order filler people is still difficult.