I actually don't understand "air fryers". I looked at a few. Simply put, they're small counter ovens. A toaster/oven is only slightly larger than an air fryer. I actually don't own a toaster/oven either. When I need an oven, I use my oven. Yea, it uses more energy but I don't use it often enough to worry about that. Besides, all these specialized appliances take up counter space.