Oracle Installation Account Is there any scenario where it is the best choice to make the Oracle installation/service account (oracle) an LDAP/AD account versus a local-only account?

More generally, is creating the Oracle account locally the best practice? I don't see this stated explicitly in their installation documentation.
I worked with an insurance company that used active directory on all of their Redhat Linux servers so that their DBA's could log in with their own credentials. The DBA's would then SUDO to Oracle which did not have a password. Hence, the upper management could track when DBA's logged into each server. Using AD can work well in Linux the manage authentication. It also makes for fewer passwords that the DBA's need to remember.