Written communication requires an alphabet of symbols, a handful of punctuation and a generous portion of well placed white space. Definitions associate words to meaning, grammar is the glue that holds ideas together. That's all it takes to recreate and archive a vast majority of human history. Text lacks* the subtle nuances of sound or the immersive story available through video, but it's hard to top its level of information compression.
Both Simple and Complex
A few simple rules under the pressure of competition yield emergent complexity. Either we're astoundingly gifted at hiding truly complex rules, or the preferred evolutionary paths for dominant communication systems are founded on basic building blocks, or a little of both. Language definitions and grammar tend towards simplicity for basic communication (yes/no), and adopt complexity for nuanced interactions.
Language's Relationship to the Net
Rapid design iterations on client and server technologies are chewing through the space of potential network architectures while inheriting traits from earlier systems. We have a long way to go before many to many distributed communication is boiled down to an alphabet. But I wouldn't be surprised if we see convergence of common definitions and grammar over the next few years, while applications and nuanced implementations continue to diverge.