I never wrote GhostTown. That was an example of what you can do with maxscript if you get deep into it. The news post I was referencing was about simple ways you can use maxscript to help out your workflow without knowing much scripting at all. You create user grids by going > Create tab (little sun/starburst) > Helpers…
Since it looks like you need people to answer these specific questions I'll bite. Saves time. I could waste weeks building unique city blocks and hallways or I could create a few dozen pieces and then mix and match them to create new unique structures. Often when you create one piece it can be turned into a bunch of other…