Indiana, until this cycle, has always adopted the NEC in the year of the code (the 2005, in 2005, etc). However, in presenting the Indiana amendments to the State Building Commission, there must also be an impact statement with every change. It is my belief that the financial burden versus the loss of property is too great for the AFCI issue.
Consider the smoke detectors that are required with new construction will protect against loss of life. The AFCI devices may protect against the loss of the home. The question, if there are X number of fires in Indiana and you safe $X by using AFCI devices, does the cost of the AFCI devices in every new home reduce the number of fires enough to make for the
practical safeguarding of property in 90.1?