I remember many years ago after Colonel Sanders sold his KFC operation, he was commenting how the quality of the food had deteriorated. He compared the gravy to wallpaper paste!
From what I understand he sold it then wound up buying it back when the quality went downhill.
I do know that at some time they changed out their fryers for ones with timers. Maybe that had an effect on the chicken. Plus I'm sure they cannot use the same oil as when the chicken was first made.
Think a lot of fast food's un-tastefulness is due to using "healthier" cooking oils, cheaper ingredients and wanting the product out to the customer as quickly as possible.
Once ate a Burger King burger a few years ago and it tasted just like a typical common store bought frozen patty. If I wanted that I could have gone to the store, bought a pack and a pack of buns for the same price and had about 8 or so burgers.
Shakeys it was wonderful to dine in.
Had a Shakey's where I live up until about three years ago when they dropped the franchise and renamed it the owner's name. Did so because for the last 8 or so years given they were the only store east of the Mississippi they had a hard time getting corporate to service them with the products they needed to make the food so they were pretty much using their own recipes anyways and decided why pay the ever increasing franchise fees. Shut down late 2015 as I recall due to the owner's health. At the time it was still run how it was when it opened in 1971 and still used the original ovens. Best pizza I ever had and nothing else I've found comes close other than Marco's thin crust although the sauce isn't exactly right. Now if Marco's would use the sauce Red Barron uses on their mini pizzas I believe they would have a near exact copy.
I should also mention that because of the smaller sizes it affects the amount of cans, bags, etc. of items to make a recipe. Chocolate chips used to be 16 oz. bags and now they are 12 oz., so to make them the way grandma used to make them, it will take 1 1/3 bags. The peanut brittle recipe calls for 2 cups of peanuts (the amount that used to be in a bag), but now the bags only have 1 1/2 cups.
Exactly and if someone doesn't know what the sizes of boxes, cans ETC... were when the recipe was first used (if the date of the recipe is even known) then they cannot duplicate the recipe without a good bit of work and trial and error.