My 2 cent

Freeze dried foods are rather expensive. If you are backpacking where every ounce counts, it may be worth the money.

If you do not have to either carry it very far or store it for long periods, there are all kinds of canned and instant foods available at the local supermarket that are cheaper and (at least in my opinion) taste better.

Bottom line:
Freeze dried is good if BOTH light weight AND long term storage are more important than cost and taste.