Green seems to indicate that in some ways redundancy has increased. Not for the power to the network links though:
In some other ways redundancy has decreased, instead of 3 forward facing cameras there are now 2. Imo Tesla knows what they are doing, they figured out that 2 was enough redundancy and they can get a better system by putting that extra compute and bandwidth somewhere else in the system.
I believe that Tesla are good at what they do and have chosen a good level of redundancy for both HW3 and HW4. And we have no indication that the redundancy of HW3 is not enough. Sure HW4 might be better but is HW3 lacking redundancy to the point that it cannot be 3x safer than a human?
I used to develop self driving cars, back then it was all about achieving ASIL D. This mean making two independent ASIL C systems, C+C=D. But Tesla have decided to not focus on this and instead rely on actual data, they will gather enough miles to statistically prove how safe their system is rather arguing about how many layers of redundancy they have. We will see what regulators decide to approve, but imo it's not like Tesla are not aware of this difference in their approach and everyone else's approach..
Fwiw, I did say that 1 OR 3 > 2, not 1>2. Aspie talk, I mean that you can argue if 1 or 3 is more likely, (imo 1 is more likely) but I think 2 is less likely than 1 and 3 combined