What came of broadband over powerline? TXU or whatever they call themselves today was going ot do it and suddenly backed out. Reportedly could get broadband + HDTV + phone.
It exists and you can buy it now, but it’s not very good.
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.