I had no idea. I started using an Amiga 1000 when I was 6 or 7, and by the time I was 12 or 13, I thought I knew some things about it. Today I learned I didn't even know the basics, or at least the basics of how the system worked. As a user, I was at least of intermediate skill, I suppose, but I didn't understand a lot of things that were happening beneath the surface.
Thanks for the explanation.