I would argue that the prices reflect at least an incredibly persistent demand to live in those cities.
Just for different reasons than before. For instance, since the pandemic many cities have invested heavily in bike infrastructure and pedestrianization. E-bikes have become extremely popular. And as the post-COVID reopening has progressed, people have been organizing local hobbyist meetups, many of them having acquired those hobbies during the depths of the pandemic.
There is a huge lifestyle appeal to living in cities, and it will not go away anytime soon. Cities need to recognize that both the massive increase in residential demand and the massive plunge in commercial demand are incredible opportunities to differentiate themselves by converting their dead-after-6pm business districts into thriving, walkable mixed-use hubs.