500+ range is probably not necessary for most people and most applications.
Maybe on a road trip where you will have a charger at your destination,
otherwise you need to be able to return to your last charging location.
So if you typically have 300 miles of range when at 100%,
and you want to end your trip with 20%, so so have only 240 miles of range.
If you cannot charge at your destination, then you will have only
half of the range available, or 120 miles.
Doing the same calculation with a 500 miles vehicle,
the available range would be 200 miles.
I like on weekend to go to some lookout in the mountain,
so extra range is really needed.
If a vehicle with an 80 kWh battery gets 300 miles of range,
then you would nedd a 130 kWh battery to get 500 miles of range.
I estimate that an extra 50 kWh battery would be a $10k to $15k option.
I wonder where such battery could be installed, maybe under the feet
of the rear passengers, like on the Lucid Air Dream Edition?
I was considering then to use some solar panels on top of the car,
but this would not really give too much extra range:
If I could get 1 kW of solar energy,
after 6 hours I would get 6 kWh or 18 miles.
I noticed that the Aptera could get up to 30 miles
of solar energy a day, but this car is ultralight.