Comment by giantrobot

Fail-safe designs are more expensive because they require redundancies, fully manual linkages, or just non-centralized control.

The Cybertruck went with daisy chained PoE automotive Ethernet variant. The same cables delivering power to subcomponents handle data. Damage/problems in a single component can not only bring down the network but kill power to all the car's subsystems. It means less wiring in the Cybertruck (and lower production expense) at the cost of durability and fail-safety. Someone looked at TokenRing Ethernet and said "yes that is best".