Most rewrites serve the engineer, not the business
a day ago
- #technical debt
- #software engineering
- #code maintenance
- Rewrites often prioritize the engineer's preferences over business value, as shown by an example of porting a CakePHP application to Laravel without tangible benefits.
- Existing code holds historical knowledge and bug fixes; rewriting it risks reintroducing past issues and losing valuable 'scar tissue' documented by Joel Spolsky.
- Unfamiliarity with a codebase or framework can lead to misjudgments; assuming previous developers made reasoned choices is crucial before deeming code 'broken'.
- Legitimate reasons for rewrites include end-of-life runtimes, loss of key personnel, high feature development costs, or business needs that outgrow the current design.
- AI can accelerate code generation but may omit context for past fixes, leading to rediscovery of old bugs and perpetuating a cycle of rewrites without addressing root causes.
- To break the rewrite cycle, document the rationale behind code decisions clearly, ensuring future engineers or AI models understand the 'why' and not just the 'what'.