[dredmorbius]

Cheap durable paper also helps.

Fun fact: printing rates increased from about 120 sheets/hour to over 1 million over the course of the 19th century. Those began with wooden screw presses that differed little from Gutenberg's to cast iron, rotary, steam and later electric powered, and web (continuous paper feed) presses, and from matrix plates (with individual type set in blocks) to offset Linotype (in which the entire print block was cast as a single sheet through multiple stages from the original matrix characters).

Thought just occurs: the falling characters of the iconic Matrix screen somewhat resemble the individual type elements flowing and falling through a Linotype machine. I don't know if that is a deliberate or incidental reference, but it's an interesting one.