Road use fees based on vehicle weight and mileage would be politically impossible for gas cars, but right wing anti EV sentiment makes them a possibility for EVs. And EVs can be light. My Bolt weighs 3,500 lbs basically the same as a Toyota Camry. As batteries improve a new version could be lighter.
My Bolt has a 66 kWh battery. The cells have 220 Wh/kg and with all the pack structure it drops to 135 Wh/kg to give a total pack weight of ~1,000 lbs. Solid state is already producing 375 Wh/kg batteries. They're more structural and temp resistant so a 270 Wh/kg pack seems very plausible.
Such a pack would shave 500 lbs off my Bolt, putting it in Honda Civic weight territory. For a 2,800 lb 215 kWh Silverado battery this tech could cut over 1000 lbs easily. The main issue is economics of it, but a weight fee adds economic incentive to lighten cars/trucks to spur this on.
Researchers have made cells that are over 700 wh/kg in a lab, so there's a possibility of saving even more weight years down the road. The holy grail is a structural battery, so the frame of the car itself is a battery. That basically adds zero weight, though repairs after a crash might be insane.