I think many people have had issues with SD card recording at some point. But unless you check the SD card periodically to ensure it’s recording as expected there is no way to know if it’s not working. And it’s very frustrating when you go to look for footage, and find it’s not there.
The SD card could go bad. It could get corrupted. There are times when it’s full and it does not erase the older footage (this was a bug in the firmware at one point.)
So I’d like to see some form of notification / message / indication when a camera cannot write to the SD card as expected. It should be able to check what it wrote to the card is actually there, periodically, and create some form on alert/notification if it’s not working as expected.
And if someone puts in a larger (64GB or larger) SD card it will recognize it as having a few MB or space if it’s the wrong format. So having a notification of low space would be good when a card is inserted.