My car has been at the SC since Thursday for FSD install. Tesla says the 12V battery failed during the install so they replaced it. Not sure how to interpret that.
I was planning on replacing the 12V battery in some time anyway as car is 5.5 years old and I'd rather replace in advance than have the inconvenience of it failing on me.
The loaner car had full FSD and I was impressed at how well it maneuvered around construction areas (I was fully ready to take control). I can't wait to have my car back with FSD.