Fiori is the new standard interface in GRC 12.0 solutions, replacing (and enhancing) the traditional SAP GUI and Netweaver Business Client (NWBC). While SAP has enriched the user experience with Fiori, it is not a requirement to upgrade. NWBC and the SAP Portal are both still supported in GRC 12.0 solutions. The primary benefit of SAP Fiori is that it provides users with a central location for all their applications and activities. If you decide to move ahead with SAP Fiori, you will need SAP UI 7.52 SP02.