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Battery costs have declined by 99% in the last three decades, making electrified transport a reality
(ourworldindata.org)
This is a most excellent place for technology news and articles.
US was built on rail, and it was way less dense and urban back then. The problem is not how "compact" a country is, it's simply a question of priorities and budgets. China and EU are investing in rail (to varying degrees), so they get rail with all its benefits. US is wasting more and more money on financially unsustainable car infrastructure, so it is getting failing car infrastructure.