Funny you should post this....
I just went through one of my airgun files — the one I use for my scope shopping:
My scope file had a section (A): "My Scope Requirements Before Getting a REAL Scope"
What I DID have was a Hatsan bundle scope with 100y parallax.
What an insult to bundle that with a low powered
airgun!
Shooting with the bundle scope showed me all the characteristics of a scope I didn't want. The list of characteristics resembled pretty much a detailed description of the bundle scope (OK, the scope color was not on the list, black is fine by me).
My scope file then had a section (B): "My Scope Requirements After Getting My First REAL Scope"
Now, I was shooting with a sub-$100 UTG 6-24x scope. And again, I came up with a long list of things that I wanted in a scope (and that I sorely missed in my current scope as I was trying to make it do things it wasn't designed to do...).
Finally, my scope file has a section (C): "My Current Scope Requirements"
It reads like it's been written by a OCD'er.
There is an frightening progression in length of each of these sections.
(A) is real short. (B) is waaaay longer. (C) is even more detailed.
With experience we get more demanding....
The
bundle scope helped me understand
the general characteristics of airgun scopes.
The
sub-$100 scope helped me to get into
the detailed features of modern scopes.
Was it worth it? Well, I wished there had been a document that had explained to me both the general and the detailed characteristics of airgun scopes. It might have saved me from buying the $100 scope.

(I'm writing such a document now....)
Matthias