The cybersecurity landscape is crossing a threshold. With the advent of Agentic MXDR (Managed Extended Detection and Response, powered by autonomous AI agents) services and highly capable frontier AI models, the asymmetry between attacker and defender is shifting once again: threat actors are using these models to discover zero-days and generate exploits fast enough to compress Time to Exploit from weeks to hours, and soon minutes. The traditional tiered SOC model (with Tier 1 analysts triaging alerts, escalating to Tier 2, and eventually reaching Tier 3 hunters) introduces latency at every handoff and is fundamentally incompatible with that speed. Security operations must answer autonomous speed with autonomous scale: by integrating autonomous investigative capabilities directly into the workflow, the exhaustive data gathering, correlation, and initial analysis that used to bog down Tier 1 and 2 gets handled automatically, empowering every analyst to operate with the context of a Tier 3 expert immediately. When the adversary automates the attack, defenders must automate the investigation while reserving human judgment for strategic interdiction and critical risk decisions, not data collection.