They are still uncommon in 5e. Elturel was taken to hell and then returned to the Prime Material. There was a lot of hell interchange, apparently. The thing that stood out to me the most was on an evil playthrough when I was murdering them, one of them was listed as a Hellrider - the order of paladins and fights that have sworn to protect Elturel. He would have either been in Elturel when it disappeared or out in the hinterlands and turned into a refugee fleeing to BG. Neither of those make sense for a tiefling paladin of lathander, tyr, or torm even given the new alignment thing. And to have enough tieflings to warrant a "Rough Riders" style posse in a holy city? That existed well before no-alignment and therefore did not have tieflings spring into existence within its hallowed walls? So they either mislabeled something, or that doesn't make any sense to me that youd have tiefling hellriders.
IF theyre refugees...still theyre rare, the odds of a local communities of tieflings existing and hopping on the city before it came back or coming together individually within its wall. Just feels thin. Ive run DIA (DM), thats not how avernus really works. It is also not how tieflings work on the Prime.
Thats a long way of saying the tiefling refugees make no sense to me, I cannot justify them.
