Our firm was prescribed installation of 12.9.1 to resolve an issue with LDAP integration. Unfortunately this bug has hit a lot of our core users and we're in a battle of using the newer version to resolve issues and rolling back to the elder version to provide a better user experience.
I'm part of the Early Adopters Program and would love to be a tester of any Alpha/Beta versions that happen to come out that believe this to be resolved.