@quicksilver
That's good advice. I have two cards that I alternate between when it's time to upgrade. It's intended as insurance to protect my time, but I've never actually had to go back to a previous card. As far as the difficulty of upgrading is concerned, I run 33 systems in RetroPie that are highly customized, as well as dual boot into an equally customized OSMC and it only ever takes about 30-40 minutes to upgrade and restore my settings back to where they were. Granted, even that amount of time can be hard to come by during a hectic week, but that's why God invented Sundays... well, you know, that and all the praising, but I doubt he's ever smited anyone for catching up on a little computer maintenance all the same.