The currently supported version branches are 2.4.x and 2.5.x, with the 2.5.0 release scheduled for May 2020, which will be the final minor release.
To that end, the plan is to provide patch and security fixes for the 2.4.x and 2.5.x line until May 2021. Additionally, security fixes will be supported for the 2.5.x line until May 2022, at which point the project will have reached end-of-life. The same end-of-life timeline applies to the Spring Boot 2 auto-configuration project.
Finally, in May 2022, we intend to “open” up the project, so that it can be directly managed by the member(s) in the community.