In many companies, years of accumulated business logic are embedded in Delphi applications. Replacing such systems too quickly often means losing not only code, but also validated processes, special cases, and tacit operational know-how.
Modernization therefore does not automatically mean a complete replacement. Often the better path is to cleanly analyze business logic, data models, and interfaces, and then reorganize them step by step. Desktop, web portal, REST server, and service layers can evolve in parallel, instead of decoupling from each other.
The decisive point is the architecture. If responsibilities are cleanly separated, even a grown Delphi system can be further developed in a controlled manner, expanded for Windows, macOS and Linux, and kept in operation without disruptions.
On top of that, today there is often the question of new target platforms. Windows 11 ARM64 or modern Linux deployments should also be planned early, rather than being retrofitted later at high cost. That is precisely the difference between a hectic rewrite and a technically calm renewal.