Electric cars are not new. The very first cars were electric.
Battery technology doubles capacity every 25 years of so. The failure rate on new battery technology is probably 100,000 attempts to one good one. Pretty dismal over the last 120 years. The failure rate is second only topped by apocalyptic predictions. Computers, batteries are not.
We get better at manufacturing them but there is a limit to electron exchange chemistry. Hi density energy like fossil fuels is unlikely without some type of nuclear involved.