Edward Glaeser of Harvard, Martina Kirchberger of Trinity College Dublin, and Andrii Parkhomenko of the University of Southern California argue that the most instructive precedent is not post-USSR Warsaw, or postwar Berlin, it is postwar Tokyo.
Firebombed into ruin, Tokyo rebuilt in a way that was strikingly decentralised: master plans quickly abandoned, local communities empowered to combine small lots through land readjustment, and figure it out from the bottom up. Before the war, Ukraine's economic activity was already shifting away from heavy industry and the east, towards services and the west. Reconstruction that concentrates investment where the damage is greatest, rather than where people want to build a new life, would repair the buildings and miss the point.