This falls into over optimization for me. The kettle takes 4 minutes, I grind my coffee and prepare for the ritual of making it. The laundry can sit till I have the time to deal with it. The dishes can sit until I have the time to put them away. At most I’d pickup an hour this way. (Incidentally all of my appliance have their noises turned off.)

I also think it’s not tech companies making these devices, they are low margin commodities. And since you’re competing adding a luxury like a notification on your phone, versus 4 minutes of your time. It hard to justify the larger margin.