I often feel that we are not using modules/classes/functions to extract domain knowledge often enough.

In this post, I discussed why we need DRY and when is the best time to do it: https://dsdshcym.github.io/blog/2018/10/26/dont-repeat-your-domain-knowledge/

TL;DR:

• We need DRY because we need to eliminate the duplication of knowledge.
• Both “abstract later” and “abstract early” are bad.
• What we really should do is to look out for our domain knowledge and persist them as part of our code.