Have you ever been in the middle of something and looked back, for whatever reason, and realized: wow, this is very different than where it started. Not that where it started was inferior, nor where it ended up.
It's sort of like grape juice.
See, I really like grape juice. I enjoy it's grape-y taste and all the elements of the juice. But maybe you put that juice in the fridge and forget it.
Then one day you pull it out, and... OMG... this is wine! (Okay, I know it doesn't quite work like that, but for the purpose of my analogy go with it.) And, man, is that wine good. It's yummy and all that great stuff.
Now, do you mourn the grape juice? Well no, you have wine! Was that grape juice any less than the wine? No again, you really liked that grape juice.