It seems most manufacturers, GM included, disagree with that and are mostly betting on full electric at this point. To the point where they are shutting down everything else (GM, Ford). And the ones that aren't (yet) are dealing with some serious challenges in the market. Battery production is indeed the limit. Or put differently, all EV manufacturers seem to be having the "problem" of their products being a very easy sell despite the cost, limitations, etc. For a lot of manufacturers that's not exactly something they are used to.
PHEVs are something that some manufacturers market to extend the runway of their legacy technology while they figure out how to get to fully electric. There are a lot of manufacturers that have stopped talking about that now that they have fully electric vehicles coming to the market. They'll be around for a while of course.
GM seems to have concluded that it makes no sense whatsoever to keep on subsidizing volt sales at a loss and the product simply makes no sense at its real price. The only reason they are keeping the bolt around (which has the same problem) is to have something to sell while they figure out how to build EVs properly so that they can make a profit. Buying a phev of course makes a lot of sense in the same way that an ICE car is still a sensible purchase. It's just that EVs dropping in price is making Phev related investments not a solid long term plan for most manufacturers. They'll milk it while they can but at this point they need to be mostly investing in EVs in order to stay in business long term.
Most EVs right now are indeed on the expensive side. This is a problem for manufacturers because expensive ICE cars used to be how they made money. That segment has been seriously impacted by Tesla coming out of nowhere and taking a huge portion of that market. That's why they are all scrambling to get in on that action. They have no other choice. The net effect of this will be that economies of scale will kick in and production of cheap and mid range EVs is where the action is going to be next.
You seem to insist range anxiety is a thing. It's not much of an issue for most drivers. It's a lot less dramatic than running out of fuel. Running out of fuel can cause all sorts of issues with cars. E.g. with a Diesel you can't just refuel the car and get going again. Running out of battery on the other hand is fixed by ... plugging it in. Worst case you have to call somebody to get you towed (or plugged into a mobile battery). And the car will tell you this is about to happen long before it happens. Only if you ignore all the warnings that you are about to run out of power and fail to address that, will you run out of power.
In any case, taking a 30 minute break after a long drive is a pretty good idea and probably something you should do regardless of your fuel/electricity needs. So, not the end of the world. Also, most people don't drive that far that often. So, having a lot of anxiety on this front is kind of irrational. Some people do drive this much of course. In that case they'll still love electric because of the fuel bills and indeed may spend a bit more on something with a bigger battery and higher charging capacity.