It's an interesting problem. Aside from the toxic cleanup issue when decommissioning the underground fuel tanks or an attached service garage, the layout of a traditional gas station is also limiting. Unlike a modern truck stop off a major highway, the majority of urban stations have a small footprint optimized for road access and throughput, but not simultaneously lingering customers.
Even without the pump islands, there isn't much room for customer parking. These stations are often situated at corners with multiple driveways, small parking areas, and no adjacent street parking. Unless you can merge adjacent parcels for redevelopment, these small stations may only be able to support a convenience store, coffee shop, drive-through food stop, or some other quick turnaround. They don't have the right layout to support lots of simultaneous customers unless they are arriving on foot or by mass transit instead of personal vehicles.
Even without the pump islands, there isn't much room for customer parking. These stations are often situated at corners with multiple driveways, small parking areas, and no adjacent street parking. Unless you can merge adjacent parcels for redevelopment, these small stations may only be able to support a convenience store, coffee shop, drive-through food stop, or some other quick turnaround. They don't have the right layout to support lots of simultaneous customers unless they are arriving on foot or by mass transit instead of personal vehicles.