Cambions in the current edition are iirc all half-devils. Which seems to be Larian's stance as well (there's a line somewhere where it's mentioned having a succubus/incubus as a parent-which are devils as well I guess in BGIII) Demons should be cambions too, but who knows what WoTCs stance on anything is these days-half demons certainly still exist, since stuff like Tanarukk/draegloth etc are still canon demon/mortal hybrids, but wotc still seems to be going with the whole idea of Tieflings all being tied to the nine hells, and having a more or less cookie-cutter appearance similar to what they had in 4e.

It's kinda a mess IMHO, I try not to think about it. But I wonder if we ever saw Haer'Dalis in BGIII-if he'd be retconned into being a red skinned horns & tail tiefling.