I doubt it's "going to damage it". Clean it when you can and polish it if needed/wanted. If you're really concerned put a coating on it when you first get it, there are a number of different options available.
Jeff Dahn has achieved almost 600Wh/kg with NCM 811 chemistry, double the density of what Tesla is currently using. Note that NCM chemistry has vastly increased energy density over LiCo by replacing more expensive Cobalt with less expensive Nickel and Manganese.
I'd say the engineering...
Directly related really. If you double the energy density you basically halve the cost. Same amount of material providing twice the energy storage.
Better in what way? It would add significant cost and only a tiny amount of additional range even in ideal conditions.
Only relatively small...
Maybe revised targets of production volume but certainly not energy density. I don't think when they announced the original 500 mile version they planned to put batteries in the bed, and now they can't even hit that range goal when taking up more than 1/3 of the bed volume with the extra pack...
I'd expect a large part of the higher than first announced prices relate directly to the slower ramp and lower than expected energy density of the 4680 cells.
Which has nothing to do with the RWS components. Even if you pretend they cost $2K, (not even close to that in reality), that amount doesn't suddenly make the truck affordable to people who can't afford it now.
I'm talking about Tesla's cost at the factory, i.e. how much it added to the total cost of the vehicle to produce not some overpriced aftermarket stuff.
It also makes it easier to maneuver off road in tight situations. If monster trucks can run rear wheel steering there is no reason it can't be made beefy enough for the Cybertruck.