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When I asked Sam Shillace, who ran Gmail and Google Apps…

“When I asked Sam Shillace, who ran Gmail and Google Apps for four years, about the costliest mistake he's seen engineers make, his response was, "Trying to rewrite stuff from scratch -- that's the cardinal sin.” quote by Edmond Lau
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““When I asked Sam Shillace, who ran Gmail and Google Apps for four years, about the costliest mistake he's seen engineers make, his response was, "Trying to rewrite stuff from scratch -- that's the cardinal sin.””

Edmond Lau

About This Quote

This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.

Rewriting from scratch is a major engineering error; it wastes resources and risks quality.

In simple terms: Avoid rebuilding existing solutions; reuse proven code.

Key Takeaway

Prioritize refactoring over complete rewrites.

Themes

software development engineering best practices productivity

Mood

practical cautious

Type

advisory instructional

When to use this quote

  • startup projects
  • legacy system upgrades
  • team onboarding
  • budget planning

Key Concepts

technical debt innovation constraints

Questions to Reflect On

  • What criteria justify a full rewrite?
  • How to balance innovation with existing stability?
A Different Perspective

Sometimes a rewrite is needed for fundamental redesign.

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