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I understand that the reality can be far more complex than pure speculation. Sometimes projects just come together seamlessly ahead of schedule, but much of the time there are unforeseen issues that delay progress for years. You are right in saying that for all of the aspects of change that we would anticipate with replacing a key component with a new battery technology there can be dozens of affected systems and unseen problems that could arise. The Falcon doors caused multiple delays for the Model X, and up to now Tesla has merely cooperated with Panasonic to build their batteries, who will not be eager to assist in creating a replacement for their products. Still, it is fun to think about new technologies, and the possibilities of what could be adapted, innovated, and created for tomorrow's electric vehicles.