I love physical books, its nicer, and more tactile and they don't even require batteries. However, books are expensive and take up space. You can't pirate a physical book. So some books that I want to have on my shelf I buy, otherwise I tend to get them from libgen of zlib.
Also, one aspect is collecting them, I like to have a little curated library. It's a nice way to show off what books you like and lend one to a friend. One of my dreams is to have a library/study.