Interesting you should mention it... About 2008-2009 I put up 35 buckets of various foods (rice, beans, wheat, grains, coffee, pastas, etc- all in Mylar bags, nitrogen filled, oxy absorbers, vacuum sealed... best recommended practices per Frugal Squirrel's prepper site) and 40 cases of freeze dried #10 cans bought from Emergency Essentials (Mountain House and Provident Pantry brands). Along with a bunch of other survival things including MRE's (both the old 80 dark brown pouch and the new tan pouch I got fresh in the field). The 5 gal buckets were stacked in the unheated/uncooled garage and the cases of cans were in the house in closets.
About 6 months ago we started eating it up and quickly found out what was good and what wasn't. We've gone through close to 2 dozen cans of various items and a couple 5 gal buckets of pasta, rice and beans.
Anything with the Mountain House name on it was good tasting and I would buy again in a heartbeat. The Provident Pantry brand is hit or miss- some things are fine and reconstitute and taste as expected, some items taste stale or don't come out as expected and some of it is plain nasty- has to be tossed.
So far of the items in buckets, ALL of the ramen was very stale and inedible, the powder flavor packs went rancid too. One lesson was to not leave beans and rice in the store packages as the plastic bags get rubbery and the ink bleeds and gets sticky... but it didn't seem to affect the contents.
The rice and beans at first seemed a little stale and the beans didn't soften as expected even after soaking overnight and cooking 2x the time... then Cathy tried a teaspoon of baking soda in the cook water and voila, beans are back to normal and rice is softer.
Powdered eggs are yuck, drink, pudding, milk mixes are all good. Ate a couple older MRE desserts from the 80's and they fresh like yesterday.
We haven't tried grinding any wheat into flour but I would think it is still ok, I'm hesitant on the pasta if it is like the ramen. We roasted coffee beans from a can and found out not to follow directions but cook them suckers until they almost burn- then it's pretty good coffee... not tea!
So, try some and see... YMMV...