Re: history.
I agree on the power of text as a technology, and the role it played. China & the Roman Republic/Empire are good examples of this.
But.... I think it's worth remembering that we lost something as we gained something. We tend to severely underestimate oral "technologies." Scholarship existed before writing. History, geography, etc. Text spent centuries or millennia as a peripheral media. It was mostly used for accounting in Mesopotamia & the Levant for thousands if years. Sometimes for religious, magical or political reasons. It wasn't a major medium for philosophy, storytelling, history or such until much later... So writing didn't really play much of a "knowledge accumulation" role until pretty late in the game.
I suspect that it developed so slowly because oral traditions were hard to beat. They had their own advantages. A song was an efficient way to learn history.
An important, if subtle, fact is that mediums are not just for communication. They're modes of thought. Text and speech will yield different ideas. Mathematics are a huge example. Ways of conveying mathematical concepts (eg negative numbers) enables us to conceive of mathematical concepts. If you write an essay, the ideas/conclusions you will have will be different. Even the difference between a scroll and a codex (book) can make a big difference. That difference is evident if you compare the modern practice of Judaism (scroll tradition) to Islam and Christianity (book traditions).
Socrates/Plato give us a nominally dividing line between the oral and written approaches. Socrates may have even been illiterate, but either way, his main medium was oral. In fact, most Greek philosophy came from the "mostly oral" period. This is why Plato, Aristotle, (Diogenes?) and others of that generation become so important. They're the link. They wrote down ideas created by oralists. This is how they could be accessed by macedonians, Romans and such.
I wonder if the charming, curious style we associate with the likes of Socrates or Diogenes is inherent to oralism. Compare them to later, literary philosophers... The literalists are far more grim. Senecca comes to mind. Even Aristotle. He's not as grim as roman philosophers, but he is a lot more serious. The oralists were playful... and greek/roman philosophy (imo) declines as writing overtakes oral traditions.
Socrates' thoughts "On the Forgetfulness that Comes with Writing" are recorded (tellingly) by Plato. It's not Plato's best piece, but very relevant to our times. If you memorise instead of using text, all your knowledge is inside your head. On paper, ideas are lifeless. Living ideas inside your head interact with each other, refine, create new ideas. When we convey them to one another, we can ask questions, read expressions, etc.
We don't just have books, we have the internet and pocket computers to access it. Socrates' point applies even more now.
One relevant example relevant to our times is "shades of uncertainty." Say you read an article about the economy, GDP growth, unemployment & such. A lot of that information is uncertain, either inherently or at this point in time. There may be dissident positions. That's usually lost in text but not in conversation.
I definitely think a short conversation about this year's economic data is more informative and deep than an article by that same economist.