I have this odd thing with dependence and like to be as independent as possible. So for my personality, a 500 mile EV is better to me than a supercharger network. 500 miles at around 65mph is about 8 hours of driving. At that point, I'm done driving for the day most likely and can park for the night (home, hotel, campground) and charge up normally (if there's a SC around, great).
I think the last time I drove that much in a day was likely when I went to my brother's graduation, but even that was like 4 hours one way, so this isn't something I'd need very often, but it would be good to have it #1 just in case I did need to make that trip, but #2, and most important, so that I have buffer in every day things.
For example, if I want to drive to see family in NYC (often enough), that's about 120 miles one way, so 240 round trip (stretching the limit of the 265 80kwh pack). With a 500 mile pack (likely about 410 miles) I'd have about 160 miles left over, which means when I got there I could drive around or show off the car without worrying about mileage, and that I could drive spiritedly and comfortably without worrying about range impact. For me, it's those little moments of security that would make it worthwhile. Charge fully before I leave, then have a carefree day.