Your WebForms is still alive, and that is fine
Every few years someone decrees that the whole application must be rewritten because WebForms is dead or because .NET Framework is old. Almost always that rewrite never starts, or it starts and is abandoned halfway. Meanwhile, the same old application keeps bringing in revenue.
The myth of the total rewrite
Rewriting from scratch a system that has been in production for years is the most expensive and risky project a company can take on: it takes twice as long as planned, reintroduces bugs that were already fixed and, for months, delivers no new functionality. Most of those big bang migrations fail.
The pragmatic path: maintain and modernise in parts
- Stabilise first: make sure what exists works, has backups and does not depend on a single person.
- Modernise where it hurts: isolate the most problematic modules and move them to modern .NET incrementally, with the application running at all times.
- Integrate instead of replace: often what is needed is not to throw away the legacy, but to connect it with something new (an API, a dashboard, an integration).
When a real migration does make sense
Migrating makes sense when the framework stops receiving security patches, when the cost of maintaining it exceeds the cost of modernising it, or when it blocks a specific business capability. But that decision is made with data, not with fashion. And it is almost always executed in phases, not all at once.
Maintaining a .NET Framework or WebForms application well in 2026 is not giving up: it is the sensible option while modernisation happens when it should and how it should.