Earlier quoted context omitted.
> The technology of written works has undergone several seismic shifts, from clay tablet to papyrus roll to codex to moveable type. This confuses a number of different types of technology. For example, we haven't undergone a shift from codices -- we still use that form for all our written works today. Clay and papyrus are materials on which text is written. Scroll and codex are physical forms in which long texts are…
I'm compressing thoughts for brevity. The codex, handwritten, allowed random access, but was still phenomenally expensive to create. On the order of a million dollars per copy. They were chained, the language was standardised -- you brought readers to the work (Latin) rather than works to readers (vernacular). Moveable type, cheap paper, mass literacy, vernacular language, typographic conventions, high-speed presses,…
So do scrolls. You're not supposed to open the entire scroll at once. The codex is better at this.
> but was still phenomenally expensive to create. On the order of a million dollars per copy.
This is nonsense. You can prepare a very expensive book, but you don't have to. The idea that books were necessarily earth-shakingly expensive to create conflicts with the known reality of commercial popular novels in the ancient world.