I'd agree the Bolt is not targeted at interstate travel. Like most Americans, it would one of the cars at the home. We tend to have more than 1 car.
GM sells 2 vehicles that run off of juice in California:
A limited range (82mi EPA BEV) low cost urban commuter that can be had for well under $17k after rebates but including all taxes. It sells poorly.
An unlimited range (53mi EPA PHEV, ~400mi more on gas) mid-priced compact sedan that is $25k after rebates including all taxes. It sells poorly.
The Cadillac model is being dropped, which redefined poor sales.
Soon, they will add Bolt, which will be ~$29k. Best guess, sales will be poor.
Are you starting to see a pattern yet?
Low cost cars that sell poorly, high priced model that didn't sell at all.
Extended, effectively unlimited range (furthest two gas stations in USA is 245mi IIRC) did not sell. Cheap effective Urban cars didn't sell either. Even with huge rebates.
Anyone seriously believe that GM adding a grid of interstate charging stations will change that?
"Oh, with the new GM grid, I can drive 2 models of the GM EV coast to coast now, and the price is low, NOW suddenly I'll consider it! One model was not enough, but 2 models changes EVERYTHING!"
The problem is not actual range, it's perceived range. Most Volt owners seldom use the gas extender. People don't drive as far as they think they do. However, amazingly enough, one of the major complaints about the Volt is Range Anxiety, even though it doesn't actually exist.
Tesla sells a lot of EVs and the SuperCharger network is prime marketing tool. However, Tesla doesn't sell a lot of cars, just a lot of EV cars. All EV sales combined is a small sliver of the US auto pie. It's all about perception.
As soon as you mention Range and Charging Times you alienate potential buyers. Range is never even mentioned with ICE vehicles, nor is refueling time. However, most drivers in the real world, neither would affect them by getting an EV. First, you don't drive as far as you think. Second, is "refueling" an EV is normally done while you are sleeping or working. It actually takes less time to refuel an EV than a gas car, since the time is virtually zero. You hop in and the "tank" is always full.
For GM to set up a grid would be counter-productive. Their lineup is low-priced second cars. Marketing that "you can go coast to coast now" is unlikely to increase sales, but only reinforce the idea that EVs are a PITA to use.
Perception conflicts with reality.