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There is an opinion out there that CPSC and NFPA were lobbied to amend NEC with AFCI requirements to create a market for it.
An opinion I share. However, I may have been influenced by industrial electricians who don't trust regular old circuit breakers. They can and do fail to work as well as fail to protect sometimes when they get a few years age on them. Such people will only have a genuine fuse box in their home. Fuses work. Breakers, GFCI, now AFCI, all too complicated and simply to create work when they act weird since most electrical stuff is dead reliable if not abused.
Certainly never heard about or saw any gear using AFCI until it became a requirement.