Before we all get into a ******* contest.....
What is required depends on the code cycle your area is following. Most states are following at least 2008....which requires AFCI's for 'all' bedroom fixtures....this includes lights. I think 2013 includes family areas.....(I'm sure a hot shot electrician will chime in to correct me)
As Norcal noted....making any changes to the electrical...especially changing your load center, would trigger the new requirements.
As for " metal cladding I.E. emt, imc, bmc etc up to the first outle", that is going to be a local thing. So, unless the poster knows the local rules in the area of the OP, no reason to bring it up.
I personally don't care for the 'outlet' based AFCI's. Reason being, it's too easy to block it for easy access. One couch or book case and one could spend hours trying to find the problem. Load center based AFCI's are really the only way to go.
I'm surprise no one posted about the evils of AFCI's and how they are a product of big business buying off the NEC.
Personally, I think they work exactly as they are intended. I've had no false trips (and lord knows I've powered enough power tools on those outlets) and they do trip when you do have a real problem. Such as the broken wire I had in an outside box.