I could see removing smaller buildings and replacing them with more greenery, and maybe building some sort of self sufficient sky scrapers in a wilderness of food forests that used to be monoculture. However, I don’t think it’s practical or necessary to remove existing urban infrastructure and build vastly more across all wilderness. In addition vertical farms and forests can be made in cities, so again not exactly necessary. Obviously we should make sure rural people have everything they need within biking distance, but we don’t need to take it to the absolute extreme.
Don’t they do that in China already? Could’ve sworn I’ve seen a post here about it. Essentially, agricultural workers live in proper high-rise apartment buildings, with all the urban infrastructure it requires, but work in the fields and whatnot right outside the town border. There’s no suburb layer, and no need for discomfort.