I think you may be confused with how FSD works. FSD does not just disengage. For any of those reasons. If the FSD stack crashes, or if it is completely unable

I think you may be confused with how FSD works. FSD does not just disengage. For any of those reasons. If the FSD stack crashes, or if it is completely unable to track its position on the road, you will get a forced disengagement - a loud alarm with a big flashing red “Take Control Now” alert. That doesn’t happen if the lines get hard to see. That doesn’t happen if snow starts to fall. That doesn’t happen if the sun is at a bad angle. Forced disengagements of FSD are very rare. The human driver of course can engage or disengage FSD at any time. The system will want a clear view of the lanes at the moment in time that FSD is first engaged, after which it will stay on until the driver decides to turn it off. You can engage FSD at night, in the rain/snow, etc. But I can see how you might assume there are dangerous conditions that humans are compelled to drive where it’s unlikely FSD would be used. And let’s even presume without evidence that is true. However the premise is flawed. The vast majority of traffic accidents are not due to driving conditions, but rather are due to driver conditions. Drivers in accidents are usually either drunk, fatigued, or distracted. Drivers in accidents are likely to be inexperienced, or overly aggressive. This is why the gap is so large (5x safer is an absolutely massive gap). Not because humans can’t be better drivers, but mostly because humans choose not to be better drivers because, frankly, humans make lots of really bad choices.