FWIW, ecm’s would be shipped in with the latest software.
Here’s why:
OEM’s don’t take title to the item until it is installed and tested.
Lowers their WIP investment.
As I study the IG plant more carefully, it is designed for all the different bits to arrive at specific doors very close to where they will be installed.
So, there are almost no parts sitting around.
Presuming typical German efficiency, the part lot is scanned as it hit’s the threshold, and goes right to GA.
Quality, inspection, validation, done before it crosses threshold.
This is a modern car being built in a modern factory using modern manufacturing techniques.
Doubt there’s a rubber mallet anywhere on site. Lol.