This is something some friends and I were talking about recently and we all pretty much agreed and had similar thoughts on this. Three examples I have are Burger King, Wendy's and Taco Bell. BK and Taco Bell used to be my two favorite fast food places growing up. As a teen I would eat at both all the time. Yeah, it's always been junk food but at least it tasted good. Taco Bell is just gross now, if I get anything that has (their) ground beef I get a stomach ache now, flavor has just seemed off for at least the past 10 years. Same now for BK. I think the last time I had a truly delicious tasting BK burger was at least five years ago. Flame broil flavor tastes almost fake or "off" now. Last few times I had the Big King stomach felt urpy. Also the patties on the double cheeseburgers are smaller now.
There's a mom and pop burger chain here that sells their own flame broiled burgers and they're great, they taste like what BK burgers and fries used to taste like in the 80s/90s (and they have the classic, thin McDs rip off fries which I'll take any day over the stupid thick cut, crusty fries everyone but McDs has switched to).
Also, I never once got sick after eating at Wendy's until they switched to that awful big "W" burger recipe a few years ago. Now the buns on all the burgers taste dry and their patties just don't seem as fresh and juicy as before. Anybody else have similar experiences? Am I crazy or are the big fast food chains cutting corners and getting progessively worse? Oh yeah and one of my other mains Subway is awful now too. Haven't eaten there in a year after getting three bad subs.
My theory is to combat ever increasing prices of goods like beef (increasing global demand) they are slowly adding in fillers like cellulose, soy and anything else edible that won't disturb the "flavor". I notice this with the McChicken, in the 90s it tasted amazing now it tastes like cardboard....