Tesla sells ~25k vehicles a month to customers (enough that they’ve cannablized sales from BMW in California) who don’t mind stopping at fast DC charging stations. The market has spoken (wrt EV vs PHEV).
While the Volt had a niche, it seems it wasn’t competitive enough versus newer market competitors.
...and around 475k ICE vehicles a month are sold in the US.
PHEVs seem like a nice option for the people who find that an EV is not suitable for their long distance travel, but would like something environmentally friendly for their short distance needs, and do not want to have two cars.
Buy a Prius and carbon offsets until EVs advance further if you’re absolutely set on not wanting to fast charge when traveling and use a liquid fuel instead. Don’t demand a niche product that no one wants to build.
While the Volt had a niche, it seems it wasn’t competitive enough versus newer market competitors.