Well....

Before you say SAP is terrible, have you tried the competition?

It has some data entry screens that are super efficient, cursor always goes to the right place, tab moves you to the right place etc. 15 years and lots of ERPs later I have never seen better

When you are viewing a purchase invoice on the ledger you can see the PO it is matched to, click on it and it goes to the PO. Click a line on the PO you can see the GRNs related. Click on them you go to the actual GRNs

Oracle ERP can't do any of that.