The science around rechargeable battery technology is NOT settled. Too many confounding variables and you can’t make guarantees about battery life unless you control the recharging regime very closely. Otherwise you’re asking the customer for the cost of replacing an internal combustion engine every 5 years when they need to replace the EV batteries. So buying an EV means a commitment to no resale value when you upgrade.
Another issue that has arisen in a Melbourne affluent suburb is that when they hook 4 or more Tesla's up for recharging the power goes off in the street.
A quick calculation reveals that if every car were to convert to electric today, with no change in usage pattern with a further assumption that charging could be manages with “smart chargers” to spread the charge load evenly throughout the day we would need to double electricity generation.