Principlev1
Buy commercial tools when requirements are standard across
Buy commercial tools when requirements are standard across thousands of users, even if they serve your needs imperfectly, unless the imperfection creates friction in high-frequency workflows.
Why This Is a Principle
Derives from Expertise Through Deliberate Practice and Expertise as Domain-Specific Schema Organization (expertise and schemas develop through practice), and Expert performance in complex domains requires deliberate (expert performance requires deliberate practice). Commercial tools for common needs benefit from collective expertise refinement. Building diverts time from domain skill development.