A word to the wise: it's good to back up your phone to your computer in case Something Bad happens; it's also good to make sure your backups are encrypted. It is even more important, though, to make sure that you're absolutely sure you have the password for the backup written down before upgrading iOS, just in case it goes Horribly Wrong and your phone decides it needs a factory reset. Apple, in their infinite wisdom, make it possible to back up your phone to a computer but not be able to restore the same backup half an hour later if you don't have the password you set a couple of years (and at least one laptop) ago written down. I think I'm going to try a combination of backups to iCloud whenever I have the bandwidth (i.e. not for several weeks right now) plus making sure I do a manual encrypted backups to the laptop and set a new password each time I try to upgrade anything.