Potentially, people are talking about two different things here, and I'm not 100% clear which it is.
1 - An "Artist Appreciation File", where the work of one artist is gathered in an archive type format. While focused on one artist, this would be more of a "spotlight" type of file as opposed to a teaching tool.
2 - An "Artist Identification File", where samples of artwork are gathered into one file to be viewed by anyone who wishes to learn how a person goes about identifying an artist's work. Obviously, this type of file would serve no use to anyone who just wants to read comic book stories.
If everyone is talking about creating "Artist Appreciation Files", then just ignore the rest of my post.
It may be easy to say "Such & Such artist has had their work identified already", but that statement does nothing to help someone new learn how to identify an artist's work. If the goal is to identify the "unknown artists", then some type of effort should be made in order to increase the number of people able to acquire this "skill", without alienating anyone because they haven't figured-out how to learn to ID artists on their own.
IF the files are going to be used to teach others how to identify a particular artist, then they have to have a place to start the learning process. With popular artists like Matt Baker, Jack Cole or (pick your favorite artist), someone new to this can be taught the techniques of "art spotting" by seeing examples of artwork that has already been identified. Without a basic understanding of what they should be looking for, someone new to "art spotting" is going to have a tough time being able to identify or give an opinion on an "unknown artist". In addition, there is no good reason to not have everything a person needs in order to learn how to identify an artist's work all in one place. If they want to see additional examples of an artist's work, or even see full stories, then there is no good reason why a simple text file cannot be added to the "Artist Identification File" so that someone who wants to learn how to ID artwork doesn't have to jump back & forth between multiple sites. The "Greatest Art Spotter" of all time may be walking through the door tomorrow, why make them jump through any hoops if they don't have to?
In my opinion, an "Artist Identification File" doesn't need to contain any complete stories. Splash pages, covers, page layouts, figure drawing, backgrounds and inking (if the artist was also an inker) should be the focus of an "Artist Identification File", not writing & storytelling. One file should be able to cover a single artist's entire career, making it easier to see how an artist's style progressed/evolved over their lifetime.
Of course, all of the above is just my opinion ... take it or leave it.