Standalone-ha vs domain vs cross data center mode

In the offical document
There are more details in cross data center mode than the standalone HA mode. Could I think some recommendations on cross data center like which sessions are better to be replicated are also applied to standalone-ha mode ?

Could I think the domain mode is a master/slave mode while the standalone mode is active/active mode ?
Is the domain mode legacy mode some way if we would like to deploy K8S/openshift