Many companies move between two bad extremes: keeping a fragile legacy system alive for too long or starting a full rewrite too early. The hard part sits in the middle: understanding what truly makes business sense.
The right question is not whether the system is old. The right question is whether it still supports work without creating growing operational costs in time, mistakes, dependencies, and lack of visibility.
When integration can still be enough
- The operational core still works, but users and managers need better interfaces.
- Data is reliable, but exchanges with other systems are slow or manual.
- The main problem is access to information, not business logic.
- You need a better workflow without stopping the existing core.
When a rebuild makes sense
- Every new change creates regressions and hidden dependencies.
- Business logic is spread across workarounds, external files, and manual checks.
- The system no longer supports required roles, audit, security, or integrations.
- Maintenance cost is now higher than building a new foundation properly.
“Legacy software is not judged by age. It is judged by how much friction it creates every time the business needs to change.”
Davide Gentile