👎 I saw Guns & Roses or Metallica in the last 3 years, it was poor. Made me wanna puke.
👍 Foo Fighters and AC/DC on the other hand, although they also are 'old', were way better on stage. Performances talking AND investment.
👍About the "youngers", I for instance saw Maneskin and Dua Lipa putting on GREAT shows, while being headliners for the first time in their careers (saying Dua Lipa can't sing is just false and wrong, sorry dude. She's known in the business EXACTLY for being great on stage.)
👎 And then, I also saw young artists completely blewing it up at being headliners, like Justin Bieber, or Avenged Sevenfold.
My point is :
Age and Experience don't matter. You can be a headliner whether you're 22 or 65, that is not a guarantee of having a good show/ bad show.