The first beta of Vaadin 25 will be released in September, and those of you currently on V24 have an opportunity to participate in a supported V25 migration program – an excellent chance to get your app migrated to V25 (at least partially) with support from Vaadin’s R&D team, and let us know of any challenges you face along the way.
See the blog post for details: Vaadin 25 beta testers wanted | Vaadin