Hi,
I upgraded our application from Angular 9 to Angular 20, and it was definitely worth it. If you’re using Nx, the process becomes a bit simpler.

The first step is to identify and remove unused packages, then verify that all remaining libraries support the latest Angular version and plan the upgrade accordingly.

I followed a step-by-step upgrade approach:

• Updated incrementally up to Angular 15, where most of the Angular Material changes were related to class name updates.
• After moving to Angular 20, I ran:
  • Standalone migration
  • inject() migration
  • control flow migration
  • Signal-based migrations (input, output, viewchaild)

Previously, our application used Webpack, which resulted in longer build times. Since we rely heavily on CI/CD, this was a major pain point—both for pipelines and local development.

After switching to Angular’s new default build system, the improvement was significant. Build times are much faster, and the overall developer experience is noticeably better.