Materials & assets are typically stored on a network share, with a few project specific materials being stored in the project directory which is also on a share. I have seen instances where that share is mapped to a drive letter (i.e. X:\) and for some reason it is a different letter (Z:\) on a different machine and that breaks everything. Having a tool to remap everything in bulk (i.e. change X:\ to Z:\ or \\Share1\Materials to \\Share2\Revit\Materials) would be fantastic. I'm using Revit currently.