At the current tech level? Everything would crumble within a week or two. It would need some kind of gerneal purpose robot workforce.
Someone has to go out there and cut back the tree that is growing into the power line.
Someone has to go out there and cut back the tree that is growing into the power line.
It seems to me that this would be a race against time, make the robots to keep things running before you lose the capabilities to do so. I somewhat tend towards not possible but on the other hand there is just such an enormous amount of stuff on the planet that could be repurposed in creative ways by a superhuman AI, it might be just about possible.