I feel good when I look at my old art work. It shows how long I've been able to display perseverance, improvement, and hard work without people supporting my art work.
I do look at some of my old drawings sometimes to remember certain parts of my story and sometimes the old drawings give me new ideas.
The old drawings can be used for things today like a video montage or a way to study what still needs to be improved when it pertains to the art skills.
The old drawings can also motivate others by showing them that if their skills are at the level of the old pictures, they have a chance of improving, too. Who knows, you just might motivate the next Walt Disney, Stan Lee, Akira Toriyama, etc., and find out through an interview one day that you motivated them.