Accord literally solved world hunger in under seven hours and the Number Man ran the economy in worm. I don’t think it is that unlikely for them to be able to build a stable city together.
Even if it weren’t connected to other worlds.
like 90% of the fatal flaws in the worldbuilding of ward come from the fact that wildbow ended worm with an apocalypse but evidently did not want to write a post apocalyptic story so the world ward takes place in makes no fucking sense