The auto revert can be useful. Scubapro Galileo has this as an option. It will revert to air after 24 or 48 hours. If you do some continuous dives using nitrox like on a live aboard and then go back home, I will go back to air after that time, if you dive with nitrox and forget to reset your DC then you will be safe from a time point of view (not MOD of course). If you dive with air then all is fine.
Remember these are suggestions for features which can be enabled or not. For some people this may not work, just don’t enable it (that’s what SP does) but the more features are available the more versatile it will be.