Would you rather they didn’t get them back in for an update and better 12v battery?
I‘m sure that VW wouldn’t want to be replacing batteries and have to pay dealers to perform software updates, but they are where they are.
Not all cars will need a 12v battery, more recent cars won’t need one as it will already have been fitted. There is one module that needs a hard connection and firmware update, one VW had decided would never need to be OTA capable, that now will need to accept OTA updates from v3.0 onwards and that’s the reason earlier cars are coming in.