First of all: this is multidrop. So if a single device fails, there is no immediate feedback to the network meaning all the other devices can still communicate with each other.
This different to all other Ethernet-based solution, which requires some sort of switch either central or distributed within each device. When something fails here, it has much deeper impact. About 5 years ago GM thought about this and required switches within each and every device. Then signals should be transmitted redundantly parallel over different links. The problem here is the proper dedublication and verification of the data. Because that costs ressources in terms of time and compute power and memory.
This different to all other Ethernet-based solution, which requires some sort of switch either central or distributed within each device. When something fails here, it has much deeper impact. About 5 years ago GM thought about this and required switches within each and every device. Then signals should be transmitted redundantly parallel over different links. The problem here is the proper dedublication and verification of the data. Because that costs ressources in terms of time and compute power and memory.