> Would at least like to use it for stop and go traffic, which is about the only thing I trust FSD for.
Depends on the type of stop and go driving. Crawling along at 15mph, sure. But the most dangerous driving scenario - whether human or machine is the driver - is a scenario with large variations in speed between vehicles and also limited visibility.
For example suddenly encountering a traffic jam that starts around a blind corner.
That's also the most tiresome part of driving and has the least risk due to low speeds. Easy win for FSD. But for all other cases it becomes a complicated ethical question.