I recommend that the very first step you take when prepping is to evaluate the most likely risks specific to your geographical area and your personal domestic situation. Most, if not all, city, county and state governments will have emergency management websites that will help you sort through the most likely disasters to occur in your area. Take advantage of these public resources.
Freeze-dried food is nothing new. As early as the 13th century, the ancient Quechua and Aymara people of Bolivia and Peru pioneered a form of the process by exposing potatoes to the freezing temperatures of the Andes overnight, then drying them in the sun. In 1937, Nestlé used industrial technology to create the world’s first freeze-dried coffee, and in the 60s and 70s, the US military shipped freeze-dried food rations to the troops in Vietnam.