I am saying that a 'summary' would require a book, and high level math, chemistry, and electrical understanding. Just putting together a set of graphs with C rates, temperature, and SoC you are probably looking at hundreds of pages worth of graphs.
And variability between cells, and any sort of internal Tesla Voodoo magic would all get missed and might be a larger part of degradation. I don't think there is a simple way to guage degradation past what they have provided.
Why do you think that? The car completely controls the rate of charge and it's internal environment. As far as any "high level math, chemistry, and electrical understanding", what would that be? There's no issue of various C rates, temperature and SOC. The car controls the first two, and I'm very doubtful that there's a significant difference due to charging above 90% SOC between going from 30% to 100% than 60% to 100%, they both go through the normal 90% SOC when the transition from normal to range charge occurs.
The battery and its management can be considered a black box. There's no need to know what's going on inside and that's likely proprietary anyway. What customers should know, and shouldn't be proprietary, is how the battery responds to range charging. Clearly it's significant enough that they issued a warning about it.
Have you ever had a car manufacturer tell you how much a cold engine will lower the life of the car? How about a hot engine? How about a light bulb manufacturer telling you how much on/off cycles affect the life of the bulb? All of these things lower the life of the object but you don't get any data on that, not even automotive engineers.
There are two reasons. There are so many variables you can't really tell people past 'driving with a cold engine isn't good for it'. Same for turning fluorescent tubes on and off.
My NSX manual warns that the engine should always be up to operating temperature before anything beyond moderate use. It's not OK to sometimes do full power runs with a cold engine, it's never a good idea. However, the reality is that the reason there isn't a quantitative value on that is because it's a trivial effect, the decrease in a car engine's life due to cold starting (within reason) is miniscule. As far as overheating an engine, I've never seen any car manufacturer say it was OK to drive an overheating car at all, whether "needed" or not, the instructions are to immediately stop and have the car serviced. I actually went to school with automotive engineering students and I can assure you that they studied the effects of ambient temperature on engines. This isn't mumbo jumbo, it's engineering.
Here's a link to a Philips site giving the number of on/off cycles their CFL's are rated for:
http://7myths.planetark.org/ Some companies really do publish information about their products, why not Tesla?
And if you do actually produce detailed numbers customers screw you on them. Broder blamed Tesla because his miles were greater than his trip. If Tesla just had a 78% on the dash he couldn't have screwed them over! And something as complex as degradation you are going to get people holding you to those numbers. You just can't publish them.
This is the ultimate argument I have a big problem with. While I certainly hope Tesla succeeds, if for no other reason that I want to enjoy my X for a long time, I disagree that it's OK to leave customers in the dark to benefit Tesla or any company. They've already gotten themselves into trouble with inaccurate range readouts, but I don't think the correct response is to simply remove all real time range estimates which is what you seem to be advocating.
This is the same argument used when food ingredient labels were first required and is being used now to argue against fracking regulation. Tesla seems to have no problem advertising 300 miles of range, but there are a lot of circumstances when that's not even close to possible to achieve. If range charging degrades the battery, but it's still OK to use it sometimes, I think they should say what the trade off is. The notion that it's too complex for some people to understand, therefore it should be kept secret seems a bit bizarre to me.