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Most things that are outdated tend to still be available like old car parts. Something needs to be made truly obsolete to become hard to replace, ever try to get a vacuum tube or replace a component for a 20 year old computer. But again what is the point right?
We are going to have some really good batteries before that is inconceivable. Gasoline and Diesel are way to useful to become obsolete and too many things run off them that will have decades of service life in them when such a technology comes out.
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