Last I heard was RFID tags had a problem going through dense objects like a gallon of milk.
I like the Scan and Go, I don't have to interact with anyone! (Except the person at the door)
I scan as I load my cart, I have totes like the PO uses in my car, from the shelf to the cart to the tote in my car. Heck I could just put the totes in the cart!
In the last few years my wife and I have been using the online order go pick it up method.
Only thing that worries me is not getting something I ordered, only to know after I get home.