DRM is also frustrating for textbooks. I’m fine buying books, I have a “trophy case” in my office of unopened books because I like holding onto physical copies

DRM is also frustrating for textbooks. I’m fine buying books, I have a “trophy case” in my office of unopened books because I like holding onto physical copies and supporting the creation of books that I find valuable. But I don’t want to lug around 40lbs of paper everywhere I go. So I get a DRMless pdf copy of the book too. I’d get the OReily subscription in a heartbeat if I could read it on the device of my choosing. But I can’t so I don’t. I want to download the ebook to the ereader of my choice (ReMarkable) where I have instant access to my entire library, the ability to markup the document without defacing it (notes are separate layers), and the ability to add blank pages for notes between the real pages (this will damage the binding of a real book). Books are objectively inferior for studying unless you need to rapidly flip between pages. And I’m going to optimize for my own time and efficiency every time.