For example, people spent hours exploring wikipedia, this could never be done with physical paper. I often find myself looking for Ctrl+F button holding a book. Interactive textbooks were posted on HN many times, like you can alter a numerical input and see graphs chaning in real time. This helps a lot for kids with limited imagination.
These days I can't live without an AI assistant. While reading, it's just so convenient just to ask. The AI might be wrong from time to time, so keep a critical mind, the AI is immensely helpful for foreign-language materials and complex acedemical papers.