Replacement players. Do they help bands, hurt bands or end bands?

Foreigner has no original members, neither does Quiet Riot or Skynard but they are still touring. Is that ok? Did Brian Johnson save AC/DC? Did Dio save Sabbath? What bands made the wrong choice and pay for it with their career? That and so much more in today conversation. Intro song created by us and Jes using a Quad Cortex. For more info on the best amp out there, visit www.neuraldsp.com