The Jevons Paradox and the End of Generalist Software: Why It's Time to Build, Not Rent.
Over the last decade, tech decisions were ruled by 'Don't build what you can rent'. But the economic basis of this decision has broken.

Custom development was the slow, expensive, and risky path. SaaS (Software as a Service) was the safe option. Companies accepted paying perpetual licenses and, most painfully, accepted modifying their own operational processes to fit the rigidity of the tool they had just hired.
But in the last 18 months, the economic basis of this decision has broken.
We have entered a phase that economists would explain with the Jevons Paradox: as technology increases the efficiency of a resource, its consumption does not decrease, but rather skyrockets.
Jevons Paradox Demand Response Curve
Applied to our sector: AI has turned code generation into a commodity. As the cost and time to produce software drastically fall, the demand for hyper-specific solutions (those we previously discarded as "too expensive") has exploded.
The New Value Graph
To understand this paradigm shift, we have analyzed the intersection between development cost and the value of business knowledge:
Software Paradox: Cost vs Value
As our graph illustrates, we are at a historic turning point —the "FDE Moment"— characterized by two opposing forces:
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The cost of "coding" tends to zero (Red Line): Thanks to LLMs and generative AI, the technical barrier to create a functional application is the lowest in history.
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The value of operational context skyrockets (Green Line): In a world where anyone can generate code, the competitive advantage is no longer technology per se, but the ability to understand what to build to impact the bottom line.
The Decline of "SaaS for Everything"
We are starting to observe a fascinating phenomenon in the market: companies cancelling subscriptions to consolidated SaaS to build their own internal tools in a matter of weeks.
Why is this happening?
Because companies have started doing the math. They have realized that the true cost of SaaS is not the monthly license; it is the opportunity cost of inefficiency.
- It is having a generic CRM that forces your sales team to make 5 clicks where they should make 1.
- It is having an ERP that doesn't talk to the plant machine because "integration is complex".
- It is paying for 100% of a suite when you only need 15% of its features.
Before, we endured that friction because the alternative (developing) was unfeasible. Today, building a "tailored suit" that covers 100% of your real needs is often faster and more profitable than implementing and parameterizing a standard giant.
Code is Democratized, Context is Not
However, here lies the trap of democratization. Having access to a scalpel does not make you a surgeon.
AI can write perfect syntax, but it lacks context. It doesn't understand the "dirtiness" of real data, operational exceptions, plant culture, or quarterly financial goals.
The bottleneck has shifted. We no longer need more "programmers" who execute specifications blindly. We need engineers who understand the business.
The Response: Forward Deployed Engineering (FDE)
This is where SAUCO methods make total sense. The role of the Forward Deployed Engineer is born precisely to cover that gap that AI cannot fill: immersion in reality.
Unlike the traditional consulting or software factory model, the FDE:
- Integrates into operations: Doesn't work from an ivory tower, but from the client's trench.
- Identifies real value: Discriminates between what is technically possible and what is financially profitable.
- Builds assets: Uses the power of AI to develop proprietary solutions that become the client's intellectual property, not just another rental.
Conclusion
We are moving from the era of generalist solutions (designed for the market average) to the era of precision solutions (designed for your unique reality).
Technology is no longer the excuse. If your digital tools don't fit your operation like a glove, it's no longer due to a technical or economic limitation. It is a strategic decision.
At SAUCO, we believe the future belongs to companies that dare to build their own advantage.
Ready to build your competitive advantage? Start here.