With the release of iOS 16, I did what I always do-get as many images as I can from my test phones and start ripping them apart to see what is and isn't there anymore. While quick images (iTunes-style backups) were pretty straightforward minus some enhancements to Messages and Safari (here if you're interested), filesystem images have been a bit different. Buckle up folks because this one is going to be a bit long. If you're looking for the TL;DR, scroll to the bottom to get a quick review of...