For your Strategic Planning: see SAP Note 2620910
SAP S/4HANA 1809+SAP
BW/4HANA 2.0 only support the app server platforms x86 Windows &
Linux, AIX and LoP LE. App server platforms LoP BE, HP-UX on IA64,
Solaris on SPARC and on x86,IBM i, z/OS and Linux on IBM Z to be
discontinued.