Still following the posts above its not a surprise that the last number of The Economist contains an article entitled "Microbes and the metropolis" in which an urbanist of Chapman University in California is cited saying that the coronavirus will speed the end of the megacity era.
J. Kotkin has not mentioned it but let´s not forget that it's not possible to guarantee that one of these days (when Covid turns to be just a distant memory) people using subways are not carrying an infectious disease much worse than the coronavirus https://www.cnbc.com/2020/04/03/the-hot-zone-author-next-pandemic-can-be-worse-than-the-coronavirus.html and i´m not speaking about a virus that will jump from a bat to humans but about a homemade virus by lunatics that want to cure the Earth of the human plague https://www.sciencedirect.com/science/article/abs/pii/S1359178917302859
Still, the question is not so much if it is really the end of the megacity era but instead the end of the megacities for rich people. Just because the poor have no other option than to stay in megacities even if they become infected. They do not have luxurious second homes in the countryside nor can they work remotely.
