In his blog post, John Uhlmann presents a taxonomy for endpoint security products, emphasizing the need for a nuanced understanding of their complementary feature sets, such as Endpoint Firewall, Antivirus (AV), Endpoint Protection Platform (EPP), Endpoint Detection and Response (EDR), and Data Loss Protection (DLP), rather than using "EDR" as a catch-all term. He highlights that endpoint security has evolved, with each layer having specific strengths and weaknesses, and discusses the importance of understanding which detection features are bypassed in security breaches. Uhlmann argues that while AV focuses on point-in-time scanning, EDR's strength lies in its retrospective detection capabilities, allowing historical analysis of threats. He also critiques the lack of comprehensive kernel callbacks in Windows, suggesting improvements for better defense. The blog underscores the importance of each security layer in providing defense-in-depth and encourages ongoing assessment of endpoint security products to ensure they meet current needs.