Integrated Development Environments (IDEs) are evolving towards cloud-native applications with the aim to relocate the language services provided by an IDE on distant servers. Existing research works focus on the overall migration process to handle more efficiently their specific requirements. However, the microservicization of legacy monolithic applications is still highly dependent on the specific properties of the application of interest. In this paper, we report our experiment on the microservicization process of the Cloud-Based graphical modeling workbench Sirius Web. We aim to identify the technical challenges related to applications with similar properties, and provide insights for practitioners to migrate their similar applications towards microservices. We discuss the main lessons learned and identify the underlying challenges to be further addressed by the community.