But the replacement isn't random. Rather people who drive the most all already replaced their vehicles to minimize costs. Gas stations would, under just natural replacement, be down well below 50% of their former sales.
And that makes it worse. Gas is less conveniently available, and more expensive. Replacement isn't just targeted towards people who drive a lot, but it's well above replacement.
I'd be surprised if there was 10 years between the last mass marketed gas cars being sold and the entire mass market fleet of cars no longer using gas. The infrastructure becomes unprofitable and ceases to exist in a negative feedback loop.
Buc-ees these days has tons of rows of EV charging, often both Tesla and Mercedes brands. I imagine we'll see a similar thing with other brands.
If they have chargers, people will stop and charge and also have something to eat.
Especially for towns not too far away from highways, but any town really.