For fire safety reasons? I would have guessed that the vast majority of all electric cars are charged inside a garage.
Yup, lithium is high fire risk even outside.
I'll have to send a note to a few old colleagues to see what the stats are today. I'm guessing the entire industry is pulling their hair out. Back in my day 3 of every 5 vehicle fires were remote start related. 1 out of 5 was some after market accessory.
Bottom line is that unattended high current is a higher risk than I'd accept. It's kind of like going to bed right after doing some welding. Not a good plan.