My wife and I recently visited her parents who live in another state, in a nursing home. Our peaches were just at their peak, so we took some with us and were touched to see how much they meant to two wonderful people who remembered the taste, but hadn't eaten any tree-ripened peaches for years--only those big, beautiful, hard, tasteless things from the grocery store, that rot before they ever ripen.
I see the same thing with apricots. The ones in the produce section are visually perfect, and utterly tasteless. I love watching our kids' friends as they taste a real apricot for the first time. They can't believe how good they are! And don't even get me started about grocery store tomatoes....
The new fruits & veggies aren't all bad, though. Strawberries are better than I ever remember as a kid, we can buy better apples in the store than we can grow in Tucson (though ours aren't bad), and if it weren't for commercially-grown mangos I'd never get to eat them at all. But there's definitely something magical about producing from your own trees and garden, and the benefits extend far beyond simple taste and nutrition. Pity the person who never gets to experience the joy of the harvest!