This is a very timely question. I was just looking at my quilting bookshelves and thinking they take up too much room. I want the info, just don't want to consume so much space. And because I have them, I can go back to 20 y/o books that still have good info.
Magazines: I'm thinking more of computer storage, especially if they have a good index. This would be way easier to find the article I'm interested in. I like the ads in magazines. I often go to the computer to find out more and check them out at the next major quilt show.
Computer tutorials and Pinterest are totally new to me. They can replace some things. I teach quilting and I hope my encouragement and feedback will never be replaced by a computer. There's something personal about classes.
I'm still a relational character and the interaction in class and on QB can't be replaced by magazines, books, or online.