Why Are User Preferences Not Migrated After Upgrade From Siebel 7.x to 8.x?

In Siebel version 7.x and higher, saved user preferences such as columns displayed and column size settings are stored by the Siebel application in .spf User Preference files. For users on Siebel Mobile or Siebel Dedicated Web Clients, User Preference files are saved by default on the local clien