They are called commissaries, not 'cloud kitchens', not 'ghost kitchens'. Commissaries are not new, they are used all the time in the restaurant industry. If you've had food from a food truck or caterer, then that food was likely prepared in a commissary.
Giving hip new names to old tech is not doing anyone a favor. Preparing food in a commissary is a sound, established business model. The idea doesn't need any fluff, delivering food prepared in a commissary, rather than a restaurant, makes perfect sense. The benefits are, lower real estate costs, shared labor, fewer stops for delivery personnel, and the ability to quickly change food offerings & experiment.