What if you are only driving a maximum of 40 miles per day, and the genset sees no use. Isn’t that bad for engines?
Home electric generators, which are fundamentally the same thing as a PHEV genset, rarely see but intermittent use throughout the year, only started as electricity is not available. Also, if you don’t plan on using your genset (and only drive 40-miles per day), perhaps a PHEV was a poor choice. EVs are available today and have a much longer all-electric-range than the Volt (a $38K 200-mile EV Ford Ranger by LionEV for example). But the reason people desire a PHEV is for the freedom of having extended range when needed (so most drivers will use their genset often enough that rust won’t be an issue).