Some of the biggest openings in security have nothing to do with patching How breaches began, per a 2026 report: - 31% exploited a vulnerability - 35% used phishing, stolen logins or impersonation scams And nearly half now involve a vendor or partner, up 3x since 2024 Full piece from a16z's Asaf Ezra and Steph Zhang on six cybersecurity companies worth building: https://www.a16z.news/p/defense-in-depth-rebuilt-for-machine