Ford had some fire-related recalls recently[1]. Interestingly one of them was for hybrids, but not due to the battery. It was due to the heat shielding placement and that there was a decent chance of fire in the event of an engine failure from combustible fluids hitting hot parts.

Also I wouldn't say the car being in motion is a convenient time to have a fire. You're often not just standing there with a fire extinguisher handy.

1. https://www.reuters.com/business/autos-transportation/ford-i...

We had a gas-powered bmw self-immolate in the parking garage under one of my buildings at cmu. Made for a slightly exciting afternoon and the most horrible smoke I've ever smelled. Don't think they ever learned why it burned.

Gas cars catch on fire with surprising frequency.

Fuel leaks, electrical shorts, you name it. A lot more frequently than EVs too.

It’s why garages are required to have auto closing fire doors.