And in any case, Jack, if the past is another country, leave it where it is, what on earth are you doing here? Folk is heritage music, whilst we're not iconising the history of our music, none the less we develop it flying on the backs of the greats who went before us. We should not leave it there, because if we do we disown everything that went before us, we disown what we do and might as well give up.
The reason border and molly survive is because they have a point, and the very question of blackface keeps our sensitivities and self-examination against the possibility we might have anything racist in our actions up to the mark: we have moved on from the listen-with-mother Noddy and his gollies: sometimes such pasts must be corrected before being left behind, but this is not one of them. We don't want the Farrage comfort blanket, persuading people to go down that broad broad road talked of in Thomas the Rhymer, the path of the comfortable conman telling us we don't need to do a reality check at least occasionally, and the broad-brush "all blackface is wrong" is equally inappropriate.