Fire Forensic stats aren't that accurate .
I forget this a.m. which gov entity collects them, but i do recall an annual questionaire
Iirc, something like 1/3- 1/2 the FD's send them back.
Most FD's simply aren't budgeted for detailed forensics. I've stood by nothing more than smoking cellar holes in my past, to which the chief(s) would claim 'electrical orgin' , simply due to nobody being home.
It's either that, or suspicious orgin, then the acelerant sniffer appears
I don't see how an all-afci society is going to have any of that change....
Especially when arc faults cause only a small bit of electrical fires :whistling2:
I still want to see the NEC have a testing section for new installations.