To be honest, I had so many SAP implementations in my career, and it was most likely not that one. Everybody adapts the software to the real existing business processes. Especially in Germany we are not yet there yet, that tech people can tell business people how to work. I think that Lidl most likely did the upfront design approach instead of building a reliable MVP, and moving forward from that. You have to integrate then a lot more with the old system, but more space to move forward and agile. Funny because it mimics a German military concept of Führen mit Auftrag ("mission type tactics").