I saw them during the "If You want Blood You got it" tour, I think it was 1979 in my home town, maybe a couple of thousand people in attendance. Wasn't a small club but not a big arena either. I kind of thought the same thing for a number of years. Brian Johnson grew on me and now I consider him just as good. Obviously different vocals but just as good. He was with the band way longer than Bon Scott and now he's gone too and maybe the band itself? For sure, I would not accept Axl Rose who I dislike to begin with as the legitimate singer.