According to ARRL, BOPL is basically dead. Hams and some other MW users fought it vigorously at every step of the way, but they probably had little effect on the regulators. What finally seems to have nailed the coffin is that BOPL technology just wasn’t cost-competitive in most places where it was tried.
I am told that my electric supplier, TXU Luminate, has BOP on now, but only to read our rural meters and probably to “turn you off or brown” via the “Smart Meter” they and nobama are trying to sell us.