Don,
"More people die in fires in the bedroom so that's where we'll start with mandatory AFCI" seems a very simplistic and flawed approach.
I would've thought that more fatalities occur in the bedroom simply because someone has to wake up before he realizes there is a fire. By that time, the blaze has well and truly taken hold and maybe even rendered its victim unconscious before he has a chance to waken.
As someone involved with the aftermath of fires, would you agree with my logic?