Most definitely digital. I really don't see any advantage of physical books over digital, besides that some look pretty.
I can read in bed without having a bright light, I can lie in bed and don't strain my hand to keep the page open, I can modify font/font size/spacing, I can buy a digital book and read it right away, I can take thousands of pages with me on vacation and only need the space of a small brochure, I can real-time translate words I don't know.
Just overall the better experience for me.
Mit Socken ins Bett und kurz vorm Einschlafen ausziehen. Ich hab kalte Füße wenn ich ins Bett gehe, aber kann mit Socken nicht schlafen 🤷