In denser areas charging will move to mall like areas where people will get out of the car for longer. Gas stations are not generally not setup for people to hang out for 30 minutes, they don't have enough space for people to park that long. They are setup for use the bathroom, grab a snack and get out. Most people charging will want to get groceries or other supplies they are getting anyway (which is to say since they can't charge at their apartment they are going to look for places to shop where they can recharge)
In rural areas (truck stops) are more setup for spending more time. They often have small restaurants already so you can eat inside. They are more general purpose stores and often serve the locals as the place to buy things between trips to dollar general or the city. They have more parking (land is cheap so they will buy more if needed), so there is place to put in all the needed EV chargers. Plus they get a lot more customers who are on trip so long they couldn't charge at home.
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.
That combined with bigger stores like 7-Eleven, CVS, Walmart, etc.. adding their own charging stations will kill most gas stations.
Its not going to be a cheap or painless conversion, but there is absolutely a path forward for most gas stations I think.