The other day I was leafing through an origami book and the author wrote something along the lines of, "Go to this youtube video here to learn about the first steps and then when you're done you can start attaching them as described below." I'm always taken aback whenever I see a link in a book. Not just that it feels weird to see a reference to a digital medium when I'm holding a physical book, but because of the ramifications. I rambled about physically owning something so you can retain it for decades, but at the end of the day no one's expecting Sony to go bankrupt anytime soon and all our PSN shit will be for naught. Link decay however is an issue. I paid for this book. And part of it will be useless the moment that address changes. Which could've been avoided if, you know, the author just wrote the fucking diagram, which is what I bought the book for.