Good note, thanks for posting.
Recently I was wondering about something else related to updates - if the car will detect and download them if it's in Valet mode. I figured out that the answer is yes. But to install, you have to disable Valet mode. Reason why I was wondering is because I wrote some code to put my car in valet mode when parked at certain locations, including at home. So I was concerned that maybe it wouldn't get updates...but it hasn't been an issue.