The optimist in me did not agree with the argument that Tesla was trying get rid of unlimited free supercharging. This recent Tesla offer is making me rethink my optimism.
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To be fair, "unlimited" anything is a nightmare for accountants. It creates an essentially endless liability on the books. No accountant in their right mind wants to deal with that!
Hence, why things like "6 year Supercharging" is much easier for them to offer -- they can create the liability, expense it over the term, and be done with it. The unlimited liabilities need to be carried forever.
As Tesla grows exponentially in size, I suspect that marketing tricks like FUSC become basically unbearable to deal with. Falls in the "it was a good idea at the time ...." realm.