If so, you need SAP Universal ID. In a few months, SAP Universal ID will be the only option to login to SAP Community. Without it, you will lose your content and badges. If you have multiple accounts, use the Consolidation Tool to merge your content.
SCM 5.0 comes with BI 7.0 (SP9). I heard the BI system is unstable until SP 14. The question is does it make any difference using BI 7.0 and using BW3x, which is also option BI 7.0 gives with the transaction RSA1OLD.