My brother came for Thanksgiving, hoping DH would make his famous cherry pie. DH *did* make the cherry pie, from sour cherries that have been in the bottom of our freezer since the year 2005. And they were spectacular.
So, yay freezer! We probably have several more containers of vintage frozen cherries in that freezer.
Sounds tasty! Pie is delicious and sour cherries are amazing. I admit I'm also equal parts intrigued and encouraged and a tiny bit wary about the vintage of your cherries. I try to rotate through my freezer stash as best I can but definitely err on the side of assuming frozen things just keep. But then I run across some general interest article listing foods and saying "this item will only survive up to two month in the freezer" and I doubt my instincts. I know it varies by the item in question but the lines with frozen food between food safety limits, marketing, and "it's fine but maybe loses a bit of flavor" seem blurry to me. If you are fine and enjoyed your pie, it sounds like all is right with the world. I keep a closer eye on frozen meat more than fruit and veg.
I am unaware of any food safety issue barring the freezer fails and the food is not frozen for long enough to go bad. Unless you are unsure that the food has remained frozen the entire time, there is no food safety line to blur. It is just a matter of preference and possibly preparation for foods frozen a very long time.
My rule is that if it makes me want to throw up, I am not going to eat it. And that could come from a smell, a taste, or an uncertainty. Like "this doesn't seem bad, but I was gone for two weeks last year and the power did go out but I don't know for how long so now I am scared to eat it and I wont." Though DW would likely eat it.
DW says if you are worried about any of your long frozen foods, you can give them to us. Like many in our community already do.