The problem for those of us over 40 or so, is that most of our childhood treats were reformulated with High Fructose Corn Syrup and other changes a couple of decades ago.
I will never forget a trip back to the US in the late 1990s or early 2000s and I got myself a childhood favorite as a treat which was Dr. Pepper - it was horrible! I thought OK, maybe my tastes have changed and I threw that out and got an A and W Rootbeer, it too was absolutely horrible.
On the next trip, I got a payday bar and it was disquesting!
This was about the time I learned about HFCS and how it changes the tastes of everything. For a few years, I could get IBC rootbeer for occasional treats at the PX in Germany or England - it was made with Sugar. Then about five years ago we were at a conference in California and I decided to get one (it was about 100 degrees outside) but I read the label and I turned to Nightwolf and said: "IBC Rootbeer has gone to the Darkside..."
So almost nothing tastes like it used to and it really isn't just changing adult tastes, it is that the basic ingredient in most sweet delights was replaced by something that tastes very different.
On my last trip to the West Coast about three years ago now, we were in a hurry and got drinks through a drive-through. They didn't have many options so I went for Dr. Pepper (again it was very hot and I can't drink aspartame). It was so vile, I couldn't drink and traded with the driver for some way over-sweetened (but with sugar) iced tea.
The few salting things I used to really enjoy don't taste right either (most now have a million ingredients on the side) and besides almost all of them used GMO ingredients.
I don't even bother with most of the "American" sections that have sprung up in Irish Grocery stores, compared to the other "international" sections, the American one is almost all sweet stuff: processed breakfast cereal (even Lucky Charms), pop tarts, twinkies, etc. My husband likes real Hersey Bars which is why I bother with them at all.
While the other international sections: Polish, Russian, Italian, Mexican, Greek, etc all have some local goodies - special cookies and cakes from Eastern Europe, Japan, popular candies from Spain or Greece; the entire section isn't nothing but "sugar."
It has a lot of things like pickled vegetables, sushi rice, flatbreads, canned beats, Italian pasta, etc.
But the American section is almost all pure junk at very expensive prices - 12 dollars for a box of twinkies anyone? Except they don't taste like twinkies anymore...*sigh*