Not true. A whole lot of the very biggest live tours these days are done with ampless stages. Most everything is Fractal or Kemper. A lot of times even when there are amps on the stage they’re props and everything is actually Fractal or Kemper.Lifeless, tubeless, speakerless, digital toys fed into the P.A.
Used by no one famous.
The Derek Trucks and John Mayers and Joe Bonamassas of the world are still dragging amps out. But most major pop, country, and heavy acts are going direct for arena tours.