Since the Import XML menu uses a precise extract of data from any table, this is a useful mechanism for copying information from one instance to another instance. For example, to move groups configured in the production instance to development, it is easy to export the production data to XML, save the file to disk, then import it into your development environment. This ensures that the development instance has all the same groups as production, including the sys_id value.
Some configuration, such as Assignment Rules, relies upon data, such as groups, and needs their sys_id values to remain constant. As discussed in the next section, Assignment Rules are captured in Update Sets, but groups are not.
For more complicated ...
