Title text:
Now that I've finally gotten an electric vehicle, I'm never going back to an acoustic one.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3214/
EV's are probably best for an actually realistic scenario where energy infrastructure is destroyed or there is a mass fuel shortage, both things that happen all the time around the world in times of crisis.
But as far as actually apocalyptic scenarios it's hard to beat a bicycle which doesn't require a global supply chain to maintain.