If agents are eating the systems of engagement, what is actually left to defend — and who gets to defend it?The conversation covers:The SaaSpocalypse thesis in Patrick's own words — multiples from 7–8x to 40x to 2–3x in under a decade, the shift from systems of record to systems of work, and why he thinks fewer than a quarter of incumbent SaaS companies have the appetite to genuinely burn the boatsDefensibility after the foundation models — why single-player workflows are fragile against OpenAI and Anthropic's distribution, why multiplayer workflows (governance, RBAC, iteration, judgment across stakeholders) may hold, and why two of the three classic data-moat pitches no longer survive first-principles scrutinyThe pivot problem — Gigya hit ten million ARR and had to pivot, hit thirty million ARR and had to pivot again, and Patrick's retrospective conviction that both should have happened earlier; a useful frame for a market where capital is letting teams defer the questionProfessional services as differentiation rather than embarrassment — how Gigya ran services at ~30% of revenue, recurring and profitable, and why Patrick thinks the FDE renaming is obscuring a durable truth about trustMayfield's own shape — seventeenth early-stage fund, ~$1.2B across the two vehicles, roughly 70% first-institutional-check, two or three investments per partner per year, and the deliberate refusal to index a categoryThe battlefield promotion to CEO on Patrick's thirtieth birthday, five months of runway, a million-dollar monthly burn, and what he actually learned from Naveen Chawda about the difference between being founder-friendly and being usefulPatrick is a GP at Mayfield. Before investing he spent eleven years at Gigya, joining as the first business hire in 2007, becoming CEO at thirty, leading the company through multiple pivots and past a hundred million in ARR, and selling to SAP in 2017 for three hundred and fifty million. He now invests at seed and Series A in enterprise and AI, with board seats at Docket AI, Duplo Cloud, BigPanda, and Scrunch AI, and writes The CEO Field Guide on Substack.Worth the hour if you think about where the defensibility actually lives.