Most enterprises think they’re rolling out Copilot. They’re not. They’re shifting—from deterministic SaaS systems you can diagram and audit, to probabilistic agent runtimes where behavior emerges at execution time and quietly drifts. And without realizing it, they’re deploying a distributed decision engine into an operating model that was never designed to control decisions made by non-human actors. In this episode, we introduce a post-SaaS mental model for enterprise architecture, unpack three Microsoft scenarios every leader will recognize, and explain the one metric that exposes real AI risk: Mean Time To Explain (MTTE). If you’re responsible for Microsoft 365, Power Platform, Copilot Studio, Azure AI, or agent governance, this episode explains why agent sprawl isn’t coming—it’s already here. What You’ll Learn in This Episode 1. The Foundational Misunderstanding Why AI is not a feature—it’s an operating-model shift Organizations keep treating AI like another SaaS capability: enable the license, publish guidance, run adoption training. But agents don’t execute workflows—you configure them to interpret intent and assemble workflows at runtime. That breaks the SaaS-era contract of user-to-app and replaces it with intent-to-orchestration. 2. What “Post-SaaS” Actually Means Why work no longer completes inside applications Post-SaaS doesn’t mean SaaS is dead. It means SaaS has become a tool endpoint inside a larger orchestration fabric where agents choose what to call, when, and how—based on context you can’t fully see. Architecture stops being app diagrams and becomes decision graphs. 3. The Post-SaaS Paradox Why more intelligence accelerates fragmentation Agents promise simplification—but intelligence multiplies execution paths.
Each connector, plugin, memory source, or delegated agent adds branches to the runtime decision tree. Local optimization creates global incoherence. 4. Architectural Entropy Explained Why the system feels “messy” even when nothing is broken Entropy isn’t disorder. It’s the accumulation of unmanaged decision pathways that produce side effects you didn’t design, can’t trace, and struggle to explain. Deterministic systems fail loudly.
Agent systems fail ambiguously. 5. The Metric Leaders Ignore: Mean Time To Explain (MTTE) Why explanation—not recovery—is the new bottleneck MTTE measures how long it takes your best people to answer one question:
Why did the system do that? As agents scale, MTTE—not MTTR—becomes the real limit on velocity, trust, and auditability. 6–8. The Three Accelerants of Agent Sprawl

• Velocity – AI compresses change cycles faster than governance can react
• Variety – Copilot, Power Platform, and Azure create multiple runtimes under one brand
• Volume – The agent-to-human ratio quietly explodes as autonomous decisions multiply

Together, they turn productivity gains into architectural risk. 9–11. Scenario 1: “We Rolled Out Copilot” How one Copilot becomes many micro-agents Copilot across Teams, Outlook, and SharePoint isn’t one experience—it’s multiple agent runtimes with different context surfaces, grounding, and behavior. Prompt libraries emerge. Permissions leak. Outputs drift.
Copilot “works”… just not consistently. 12–13. Scenario 2: Power Platform Agents at Scale From shadow IT to shadow cognition Low-code tools don’t just automate tasks anymore—they distribute decision logic.
Reasoning becomes embedded in prompts, connectors, and flows no one owns end-to-end. The result isn’t shadow apps.
It’s unowned decision-making with side effects. 14–15. Scenario 3: Azure AI Orchestration Without a Control Plane How orchestration logic becomes the new legacy Azure agents don’t crash. They corrode. Partial execution, retries as policy, delegation chains, and bespoke orchestration stacks turn “experiments” into permanent infrastructure that no one can safely change—or fully explain. 16–18. The Way Out: Agent-First Architecture How to scale agents without scaling ambiguity Agent-first architecture enforces explicit boundaries:

• Reasoning proposes
• Deterministic systems execute
• Humans authorize risk
• Telemetry enables explanation
• Kill-switches are mandatory

Without contracts, you don’t have agents—you have conditional chaos. 19. The 90-Day Agent-First Pilot Prove legibility before you scale intelligence Instead of scaling agents, scale explanation first.
If you can’t reconstruct behavior under pressure, you’re not ready to deploy it broadly. MTTE is the gate. Key Takeaway AI doesn’t reduce complexity.
It converts visible systems into invisible behavior—and invisible behavior is where architectural entropy multiplies. If this episode mirrors what you’re seeing in your Microsoft environment, you’re not alone. 💬 Join the Conversation Leave a review with the worst “Mean Time To Explain” incident you’ve personally lived through. Connect with Mirko Peters on LinkedIn and share real-world failures—future episodes will dissect them live. Agent sprawl isn’t a future problem.
It’s an operating-model problem.

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If this clashes with how you’ve seen it play out, I’m always curious. I use LinkedIn for the back-and-forth.