I enjoy reading really old programming books, the 1997 edition of Learning Perl mentioned in the article being a perfect example. I don't fret over the exercises, but if it's well-written it gives a glimpse into how people thought about technology/code/computers at that point in time, like the tech equivalent of flipping through old newspapers.
I agree. I also read a few books written by Microsoft people back then. I really enjoyed the writing style and the more hardcore programming environment back then. Wish I could live through that era.