I didn’t even know this was possible. Looks like my current oven may be able to do it - it has a ticking timer knob - but pretty sure all previous ones didn’t have this feature.
Other than the use case you have mentioned I can’t see any reason to use it. It would be annoying to have the oven turn off before the food is cooked to perfection, which it rarely is at a prescribed time
Imagine working your entire life and then dieing to covid during retirement. A tiny fraction of your life was free.