Edit: just to show what I'm talking about, here's what plugshare.com shows for CCS chargers in the middle of the US:
http://mikeash.com/tmp/screenshot_F67FD9DD-D048-43EC-8DDF-9E...
That gap in the Nebraska is 336 miles long. Utah to Colorado is likely to be quite challenging with the mountains. East of St. Louis is another tough area.
I think you could do the trip entirely on DC chargers if you took some of the legs really slow to extend range.
You'd expect to use a mix of DC chargers and Level 2 chargers. I think it's doable in both cars but I'd personally never take that trip in either of them. I don't know how often people are doing LA to NY trips that they'd ever decide between cars over their ability to do that vs just renting a car (or flying).
LA to NYC is a pretty unusual trip. The Bolt is still a difficult sell for more typical long car trips, though. I've done a dozen thousand-mile legs in my Model S without a problem, but they'd be really tough in a Bolt. The chargers do exist for the routes I've taken, but they're not very conveniently located and often are single units, leaving you vulnerable to being blocked, broken, or in use.
I think the Supercharger network is adequate for road trips, but it's the bare minimum to make it reasonable.
