She's alright, but she needs a few more albums with her voice on them, she doesn't sound that great singing Chester's songs. At least at the Vancouver show. Still very enjoyable but her own songs are where she shines. That's probably not surprising to anyone though
To some degree you are correct, however there is a massive difference between a band like AC/DC which had jokingly been said they have have the same album for 40 years, and say Metallica.
Metallica helped define what Thrash Metal is. But listening to Load/Reload vs Ride the Lightning is a huge difference in sound.
And you take it forward another 10 years from Reload the sound has changed all over again.
Very different from AC/DC but then again most bands/artists don't have 50 year careers as the biggest name in their musical setting
TIL my friend didn't actually have a job and just gets paid to do nothing