What causes turbo failure?

Could you elaborate on the potential causes of turbocharger failure? Are there common wear and tear issues that contribute to this? Could poor maintenance practices, such as infrequent oil changes or using the incorrect type of oil, play a role? Are there any external factors, like extreme driving conditions or over-revving the engine, that could lead to turbocharger malfunction? Additionally, are there any manufacturing defects or design flaws that have been identified as a cause of turbocharger failure? Understanding these factors could help prevent future issues and extend the life of the turbocharger.