Hot take: AI's not going to kill open source code security

Cal.com's decision to abandon AGPL-3.0 and go closed-source, citing AI-enabled security threats, is challenged as a revival of the discredited 'security by obscurity' argument. The author argues open source has historically proven more secure than proprietary code, and that AI tools can be used defensively to patch vulnerabilities just as easily as they can be used to find them. Community reaction has been largely skeptical, with many suggesting Cal.com's real motivation is protecting commercial interests now that the product is profitable. The counterargument — that open source libraries can share AI-powered security auditing costs while closed source must bear them alone — is presented as a stronger position.