ArcGIS Enterprise 11.0 is here. Before you jump on the bandwagon, be aware that ArcGIS Enterprise 11.0 includes several retired and modified workflows. These architecture and application changes are likely to impact your environment when upgrading from an earlier version of the software. For example, the removal of the ArcMap-based runtime will prevent you from publishing map services using ArcMap. You will also need to convert ArcMap based services to ArcGIS Pro based services. You should consider 10.9.1 until you are ready for 11.