PHEV is the worst of both worlds. You have to do maintenance that you would normally do on an ICE. The up front cost is often the same or more than EV or ICE.
The smart features aren't really that much extra. You are basically just paying for a couple extra cameras. The software part is scaled across all models.
That person had a PHEV (2014 Chevy Volt)... It was not totalled, they can still drive it on gas, and the battery is only 16.5kwh, so if you wanted to replace it (though you don't need to), its only like $5k.
If a person in a trailer park is buying a brand new car from a dealership they can afford to have a level 2 charger installed. But also a lot of people are fine with just a normal plug.
There will NEVER be an equal amount of chargers as gas stations simply because it's not necessary. Most people charge at home.
The calculator is correct