I'm seeing more and more ads regarding this subject. My wife and I have a nice supply of "grocery store" foods stored up, but nothing with that long of a shelf life. None are cheap, so a little research is in order. Shelf life, nutrition, calories are all good measures, but the stuff has to taste good, too. I figure somebody in the Gulch may have the scoop on this topic.

Sardines packed in olive oil last 5 years and are very tasty and nutritious.
Lentils & other legumes, dry, in 2 lb packs last forever and contain a surprising amount of protein.
Seeds, not treated, for bean or alfalfa sprouts to eat.
Powdered milk & eggs.
Coconut oil is good internally, externally and medicinally.
Vitamin A, halibut oil capsules, zinc pills & vitamin D are good for years.
All canned foods are good for 5 years but weight becomes an issue if bugging out.
Dried or smoked meat, fish, nuts & fruit keep 5 years.
Indoor herb garden is easy for basil, parsley & more.
Water filtration devices each good for 1000’s of uses: . https://www.amazon.com/Sawyer-Product...

Most are not worth eating. I pack my closet with dry goods and oxygen absorbers.

I've seen the spreads in the commercials for these meals and it all seems to be, what I call, "Mushy Meals"...Where's the Beef?
If you want real meat, it ain't cheap, from what I gather.

My patriots supply sponsors many of the content providers that I follow. That said I am like you we have lots of store bought food ....rice, pasta, canned goods are the longest lasting items. I have not tried any MRE products.