Technically, no - there has never been a truly communist society. They’ve all really been communist in name only.
In order for the society to be truly communist, property must be communal - that’s the fundamental requirement.
And in order for property to be truly communal, all must have an exactly equal right to it, or more precisely, an exactly equal right to share in control of it.
The moment that hierarchical authority is introduced, control over the society and its property is tied to that authority. The right to exercise control over property is vested not in the people communally, but in the system by which authority is designated and exercised - the state. And that means that for all intents and purposes, regardless of any claims to the contrary, all property is actually owned not by the people, but by the state. And that is not and cannot be communism.
Digital, no contest.
I’m an old guy and I’ve been buying and reading books for most of my life. I own thousands of them, filling up shelves and stacked on tables and cluttering everything, and that’s even with the bulk of them in boxes in my garage. I love them and I love being surrounded by them, but they’re a chore and a burden.
And I have a collection of almost as many ebooks, all in a few GB on a tablet.
So ebooks win on space and convenience.
As far as the actual process of reading goes, they’re pretty close to the same, but ebooks have a bit of an edge. I have no issues with a screen, so words on a screen or words on paper are pretty much the same. Physical pages though are bound along one edge and flexible and generally at least subtly curved, while a screen is perfectly flat and evenly lit. Also, on a physical page, I’m stuck with whatever typeface is there, while with an ebook, I can scale it to whatever I want or even change the font or colors or whatever. so ebooks win there too.
And while I’m reading an ebook, I can search the text for any term or character name or phrase, so I can refresh myself on things or find a particular passage or whatever without laboriously thumbing through the pages, and I can switch over to a browser anytime to get background for anything or just look up a word.
And when I finish or drop an ebook, I can just tap the back arrow to go to my shelf, or switch over to an app or browser and go online, and find another one.
So… yeah. I really don’t think there’s one single thing that physical books do better than ebooks, other than serving as decoration - filling space on shelves.