We are still awaiting a breakthrough in batteries for electric cars. Lithium, used in most (all?) electric vehicle batteries is a rare earth material in short supply. These batteries are expensive and big. There is also the issue of charging.
A breakthrough may be on the way promising much better ranges, less cost, and fast charging times. Until this happens, I cannot see a tipping point when there is a really big take-up of electric cars. Imagine - far less expensive electric cars, very infrequent charging, long ranges. It will happen.
See https://www.carmagazine.co.uk/electric/solid-state-battery-ev/ .
