Some ovens do have automatic shut-offs! Most popular oven brands have options for newer kitchen appliances with digital timer shut-offs. Some ovens have automatic shut-offs where the oven will shut off on its own after a set number of hours. Others have a digital timer option, where you can set a timer where the oven will shut off at a specific time. Only some ovens come with automatic shut-off options and these are typically newer models. If you're thinking about leaving the house because your oven will automatically shut off - don't. You shouldn't rely on your oven to automatically shut off.