So that's hard to answer for me.

I like physical because I then own the thing and can do what I want with it or give it away.

But digital is easier to read for me. I've never been a particularly fast reader, I also have eye floaties, and I might be dyslexic. But having like Edge use its read aloud feature (for whatever reason the built-in read aloud voice is the most pleasant to listen to, less sharp) I can crank up the speed and just follow along as it reads it to me and I can process it so much easier and faster than if I had to do it the old fashioned way.