Why do we have people working on trolleys and stuff like this?

They are principally a component of Squadron 42. They're used in several of the background animations and things that are going on aboard life on a ship like the Idris or the Javelin and whatnot. And so work is prioritized for that purpose as we continue to bring that game to completion. And then, as always, the technology of one, the assets of one can often be used to help and push forward the other.