I really dont think the article is good at promoting that idea. And one problem (frequent with Paul Graham writing) is that it builds false dichotomy in between supposedly simple talk language and complicated written language.

Written language is not inherently more convoluted and complex. Not even on discussion forums with untrained people who dont read after themselves.

> It seems to be hard for most people to write in spoken language.

The written texts end up convoluted frequently because people do write them as they think they would speak. People speak in complex sentences, tone of voice making the difference. Then they see all the horrible warts and try to fix them - badly.

Also, the article does not contain actionable advice on how to write. It does not help you to deal with sentence structure nor help you to refactor bad sentence. It is fluff.