We still don't know how to systematically write great word explanations

Word explanations are already great, but they are extremely rare and seem to require a very skilled explainer, and may only be possible for some topics. How can we (as a civilization) improve on more systematically/consistently writing great word explanations? This means:

• We want to get better at teaching people to write great explanations; we want to turn it into a science such that anyone (above some minimal level of competence) can reliably learn to do it.
• We want to learn to do it for a greater variety of topics. I have a feeling that we really only know how to explain things that are mathematically/symbolically simple, and where we don't have to cover too many of the prerequisites at once.
• We want to learn how to do it faster/more efficiently.

See also

• Explanation science
• What makes a word explanation good?