the AC/DC “classic years” are everything after the Australian High Voltage up through Back and Black. That’s mostly what they play live. There are relatively few songs that have endured as part of their setlist released after that. For Those About to Rock and Thunderstruck are the most enduring. I think other than that it’s rare to hear anything over 10 years old that came out after Back In Black. I think that more recently, because they’ve released fewer albums, they’ve dusted off some songs they hadn’t played in a long time.

I’m not arguing you have to hear all their albums, since you don’t seem to like the band much. Just pointing out that Let Their Be Rock is one of their more canonical albums.

FWIW, Powerage is the most obscure internationally released Bon Scott album, but I think it’s one of their best and that doesn’t seem to be an unusual opinion. Not sure why there are so few songs from that album that stuck around. Sin City is the one that stuck around.