The article critiques common shortcomings in post-mortem reviews, emphasizing that many recommended actions are merely aspirational and fail to address systemic issues. It advocates for concrete changes to the system that prevent recurring problems, rather than relying on team members to simply "try harder."

The article discusses why large software systems are often poorly understood, even by their creators. It highlights the challenges of documenting complex features and the reliance on engineers' tacit knowledge to answer basic questions about the software's functionality. As software evolves, keeping track of these details becomes increasingly difficult.