2040 is pretty far away, plenty of time for the techs, markets and infrastructures to mature. Besides, it's only about new ones. You'll still have 10 good year

2040 is pretty far away, plenty of time for the techs, markets and infrastructures to mature. Besides, it's only about new ones. You'll still have 10 good years of second hand cars, probably 20 since anticipation will make people stock on models they think they'll sell well. And of course you'll have the obvious delay that is exceptionally given at the end of every single of those big shifts. So 2040-60 seems a reasonable target given how important it is for humanity. And a deadline will give incentive to find solutions.