We are simply pointing out there was a time when the surface one could write on was so precious, people used to cover previous works and re-use it instead of obtaining new ones (vellum, etc). So -- you're not wrong about the explosive growth. We're just pointing out the abundance of even writing instruments occurred at a certain point in history.
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Paper and ink were good enough for centuries.
Paper especially was very expensive until approximately the 19th century.
The explosive growth in the printing industry suggests otherwise.
We are simply pointing out there was a time when the surface one could write on was so precious, people used to cover previous works and re-use it instead of obtaining new ones (vellum, etc). So -- you're not wrong about the explosive growth. We're just pointing out the abundance of even writing instruments occurred at a certain point in history.