Even if AI makes it easier to build competing software, incumbent SaaS giants retain customers due to immense switching costs. The operational disruption, retraining, and integration challenges of migrating a large organization create a powerful moat against new entrants.

User stickiness for AI models is increasingly driven by the 'harness'—the custom prompts, workflows, and integrations built around a specific model. This ecosystem creates high switching costs, even when a competing model offers incrementally better performance.

The cost of re-validating, QA-ing, and re-training internal apps built on a specific LLM far outweighs potential token savings. Once an application is "dialed in" on a model like Claude Opus, the business has little incentive to switch, creating a durable competitive advantage.

The traditional moat of enterprise software—high switching costs—is eroding. For the first time, customers can harness powerful AI models to custom-build their own alternatives, particularly for ancillary applications. This threatens the growth models of incumbent SaaS companies that rely on upselling.

The ability to generate code cheaply with AI doesn't threaten enterprise SaaS incumbents. Their true barriers to entry are trust, governance, security audits (like SOC 2), and established enterprise sales motions. These elements are far more difficult for a new entrant to replicate than the software's codebase itself.

An enterprise CIO confirms that once a company invests time training a generative AI solution, the cost to switch vendors becomes prohibitive. This means early-stage AI startups can build a powerful moat simply by being the first vendor to get implemented and trained.

Incumbent software like Workday creates immense stickiness, not through love, but through deep integration and high switching costs. This creates a 'Hotel California' effect where customers 'can check out any time they like, but they can never leave,' a moat that only a 10x better alternative can breach.

In enterprise AI, competitive advantage comes less from the underlying model and more from the surrounding software. Features like versioning, analytics, integrations, and orchestration systems are critical for enterprise adoption and create stickiness that models alone cannot.

The most defensible businesses, especially in enterprise software, create such high switching costs that customers are essentially locked in. This "hostage" dynamic, where leaving is prohibitively difficult, is a stronger moat than simply having satisfied customers who could still churn. It's the foundation of an enduring software business.