[new_realist]

The 1000 miles per hour figure is burst, not sustained. As the battery fills up the charge rate will slow.

There is a fire risk to charging, but there's nothing you can do about it, so it's better to exit your car.

[davidgould]

There is very little evidence for “fire risk to charging”. Anecdotally most people at Superchargers sit in their car. The charge rate does slow as the battery gets full. But it’s rarely necessary to charge fully. The optimal plan is to arrive at the Supercharger almost empty and charge only enough to get to the next one. That way most charging is at higher rates.