Some things I can say from my experience of .net upgrade and some I have seen in current project 1. Assess Compatibility – Review features available in new language and those which are deprecated from old. Review API, Library and framework dependencies 2. Set Up Testing Environment – Create a sandbox, gather test cases, and use feature flags. 3. Upgrade Dependencies First – Update third-party libraries before the language upgrade. 4. Incremental Upgrade – Upgrade modules gradually if possible. 5. Refactor Code – Address deprecated features and optimize performance. 6. Extensive Testing 7. Phased Deployment – Use staging, canary releases, and rollback plans. 8. Monitor Post-Upgrade

A completely new programming language? Why are you doing that? You're in essence re-developing your system and all that time tested bug fixing is now going to be gone and you're in for a whole new batch of issues.

To keep the systems stable, we should follow the following approach according to me - 1. Create a parallel branch in the repo for the code. 2. Work on the parallel branch and upgrade the language version and find out local code compilation is good. Debug and fix as many issues found. 3. Next we need to deploy the code from the branch to dev environment with prior notification to team. 4. We then do regression testing of the entire application and also check any sonar and/or security issues which might come in. 5. Once we have assured that there are no issues, we can raise an MR to the master.

Migrar a un nuevo lenguaje de programación puede impulsar la eficiencia y escalabilidad de tu sistema, pero ¿Cómo garantizar una transición sin interrupciones? Aquí algunas estrategias clave: ✅ Pruebas rigurosas: Antes de la implementación completa, realiza pruebas unitarias, de integración y de carga para detectar posibles fallos ✅ Despliegue incremental: Implementa cambios de manera gradual para monitorear el rendimiento y abordar problemas antes de que escalen. ✅ Documentación detallada: Mantén un registro claro de cada cambio para facilitar la resolución de problemas y el mantenimiento futuro. 🔹 ¿Cómo garantizas la estabilidad de tus sistemas al actualizar lenguajes de programación? Comparte tus mejores prácticas en los comentarios

Assuming the question is referring to the version bump for a language (eg Java8 to latest version), and not moving to another interoperable language (eg Java to Kotlin). While both have some overlaps, there can be significant differences eg speed of migration, scope of disruption etc. When bumping the version, detailed planning, thorough testing, structured deploymens, and monitoring essential metrics, and sharing regular updates are must for maintining the systems stability. A major change like this needs to be managed through a campaign where timelines are established, tracked and derisked regularly to achieve the progressive milestones.