Why Solution Manager 7.1 are not based on NetWeaver 7.4 ?

Hello,

I have read SAP Notes 394616.

According SAP Solution Manager - SAP Library ,Solution Manager are based on SAP NetWeaver 7.0 EHP2 SP15

and CRM 7.0 EhP 1 (BBPCRM 701).

But SAP CRM 7.0 EHP3 has been released and are based on SAP NetWeaver 7.4 SPS 07 (SAP Customer Relationship Management - SAP Library)

Is the next SAP Solution Manager will be based on NW 7.4 like SAP Solution Manager 7.1 on HANA ?

What will be the evolution to change NW 7.4 ?

Thank you