I love the example of the Bay Bridge in San Francisco. A decision was made in the 1990s to replace half the bridge, and rebuild the other half. And all this had to be done while the bridge, which is core to the flow of life in the Bay Area, continued to function. The human species is good at this kind of evolution. And when all is said and done, there will be a new bridge where the old one stood, and the people who travel over it will not remember that there was another bridge here, or care