Jelena,
Honestly the fact you are asking this questions shows that SAP does not pay attention to its past or chooses to ignore it.If master data is backbone of ESA then why BDC? I asked the linked question in 2007 and it's almost nine years later. I wonder if SAP fixed this issue about using BDC for inbound IDOC processing in standard SAP for creating vendors?
The fact we are discussing BDC with S/4 due to all the interfaces not being available yet is shameful. This is something that should have been fixed in SAP ERP 10+ years ago! Then again read the comments on this blog Why BOPF is a strategic part of our application architecture and you will understand how most of "Eclipse" crowd fails to understand this failure.
Take care,
Stephen