If you get a book which is 600 pages, you have to reduce it to a script of 100 pages. In two hours of film, you cannot possibly include all the characters.
The more you are getting older, you lose a little something. Of course there is another advantage, because of your long experience you can use it.
Now, the downside to conservation is that so much is done for the public, which almost always mars the environment that one wanted to conserve.