Also, I kinda love the aesthetic. I wonder if maybe the buildings even help the trees by giving them shelter they wouldn't otherwise have. It'd be interesting to see if climax species start to regrow sooner in places like this.
@InvaderXan a fact i think is interesting: most eastern bloc prefab apartment block cities like this were purposely built around existing vegetation - so if they had some old, taller trees, they'd sometimes alter their construction plan to have them in courtyards etc., so that when people move in they already have some greenery around. i think having native plants there already instead of ornamental plants might possibly have added to the speed and extent of reclamation.