9 hours ago, ElsieD said:I used to have a Black and Decker toaster. It made fine toast.
Compared to a toaster oven, sure.
Let's put it another way: any toaster generally will make better toast than will a toaster oven. This for the simple reason that the elements are closer to the bread, making for a faster toast with a moister center. Better toasters have more "turns" in their resistive wire.
The T-20 and successors judged darkness and shutoff via an early but effective IR sensor. Most toasters before and after have used a variant of the crude thermal spring.