Why would I buy a Chevy Bolt for the same price as a Model 3, even if I have to buy it "off menu"? (And deliveries have started, BTW: https://electrek.co/2019/04/15/tesla-delivers-35000-model-3/) Or slightly more for the more available Standard Plus Model 3?
The Bolt is wonderful, but it's limited to 50kW charging and even more important it has no access to a consistent, strategically placed network of well-maintained chargers spanning the continent. Basically, the Bolt is still a city commuter which cannot feasibly take road trips of any significant length (outside of charging corridors in the Northeast and West coast), not too different from a Leaf, functionally.
At least with the Volt, you could still take road trips the same as any other car.
(And all of this ignores the panoramic glass roof, the autopilot features, the superior cosmetics, the improved per-mile efficiency, etc, etc.)
And yes, GM is in the same situation as Tesla, having the federal EV credit phased out. And that's a major shame. GM, with the Volt in particular, was a major pioneer in modern electric cars, along with Tesla. And now both are being almost punished for their foresight and initiative. Shows how very little the Congress/Administration/federal government currently values emissions reductions or even rational industrial policy... China very likely may end up owning the EV market.