The most valuable is the developer experience and the extensibility of the overall ecosystem.
GitHub Advanced Security prevents accidental exposure of user passwords and sensitive information in code, enhances developer experience, and offers ecosystem extensibility. Significant features include security and dependency scans, cost-effectiveness, scalability, and reliable AI findings via CodeQL. However, it lacks a centralized dashboard, timely open-source updates, broader language integration, and refined vulnerability categorization. API security improvement is needed, along with a customized scanning ruleset for comprehensive protection.