I find it unlikely that there would be no memory leaks needing patching, no important compiler updates, and no API-compatible dependency updates that should've been applied to the stable release.

The Linux Kernel, Firefox, and lots of projects have some sort of Long Term Service branch where simple uncontroversial improvements are added.

Modern best practices for releasing open source software are important, and a project that doesn't seem aware of any of them makes me concerned about their attention to detail.