Code review becomes the top decision-making surface, outgrowing the diff

The core change described is that code review has moved from being a simple correctness check to the primary venue where engineering decisions are made. This shift means that the review process now carries more weight than the raw diff alone. As a result, the focus of review expands to include judgments about code style, architecture, and overall taste.

Adopting this broader role introduces costs related to establishing shared subjective criteria. Teams must spend time discussing and documenting what constitutes acceptable taste, which can lengthen review cycles. Without explicit guidelines, reviewers may rely on personal preferences, leading to inconsistent feedback.

The process can stall when taste disagreements cannot be resolved, especially if team members lack a common aesthetic or when the subjectivity becomes overwhelming. In such cases, reviews may stall, be bypassed, or devolve into informal discussions outside the tool. The system stops working when the taste problem outweighs the ability to reach consensus.

If the taste alignment fails, organizations might see a rise in ad-hoc approvals or a reliance on senior engineers to make unilateral calls. This undermines the intended benefit of review as a collaborative decision-making surface. Ultimately, the effectiveness of the process hinges on how well the team can codify and enforce the subjective aspects of taste.