As a newbie regarding SAPUI5 and SAP Fiori I kindly ask you, whether it is doable and could make sense to combine a classical SAP ERP (ECC) 6.0 system with a side-car front-end-server for leveraging SAPUI5 and SAP Fiori, particularly to develop and use customer-specific Fiori Apps right now.
A customer does run a comprehensive SAP ERP (ECC) 6.0 landscape, which can not be easily and quickly converted to S/4HANA. Most probably, this might happen in 2022 or 2023. If feasible, they like to develop and use SAP Fiori Apps (self made) in the meantime.
What are the prerequisites, please (hardware, software releases, versions)? How to limit the effort?
Many thanks in advance for your comments and recommendations!