Code Is Cheap, Thinking Isn't - Cognitive Debt Is Becoming the Biggest Barrier to AI ROI
SD Times, Friday, September 25th, 2026
As AI makes code execution nearly free, undocumented decisions and tribal knowledge - cognitive debt - become the real barrier to ROI.
For years software development was constrained by the cost of execution, but AI has made writing code dramatically cheaper, exposing a different constraint the article calls "cognitive debt": the memory behind why decisions were made, often undocumented and living only in employees' heads.
That gap matters more now because AI agents lack the context to make good decisions when workflows and rationale aren't captured explicitly.
The article proposes a four-stage framework - diagnosing hidden dependencies, classifying decisions by risk, governing through explicit rules, and expanding based on evidence - arguing the organizations that win won't be those deploying AI most broadly, but those that document decisions and clarify ownership, since "execution is no longer scarce. Clarity is."