Ovens are one of the few appliances where I can see some sense in smartifying them, honestly. Turn it on to preheat before getting home (or if you're just too lazy to get up), have it send alerts to your phone when the timer goes off so you don't miss it due to being on the other side of the house or having your headphones on, check how long's left on the timer before deciding whether to start watching a new episode, stuff like that. There's a combination of long cycle time + necessity to respond urgently that creates an actual use case that isn't there for eg toasters or dishwashers.
I know so many people that shove used pots/pans in the oven when they just can't face doing the washing. Turning the oven on when you're not home just sounds like a recipe for disaster.
