Well, having a domain is basically documenting your IP publicly. It’s not that risky.

Except the circumstances in which they run on gasoline are not that exceptional: https://theicct.org/publication/real-world-phev-use-jun22/ And the lower weight of the battery is partially offset by needing an additional drive train, a transmission with multiple gears (purely electric cars usually have fixed transmission) and other smaller parts required for the combustion engine. These also increase the required maintenance a lot (e.g. requiring oil changes).