What is the disadvantage of a turbo engine?

Could you elaborate on the potential drawbacks of a turbocharged engine? I've heard about their advantages, such as improved power and efficiency, but I'm curious about the potential downsides. For instance, does the turbocharger add complexity to the engine, potentially increasing maintenance costs? Are there any reliability issues to consider, such as higher temperatures that could cause damage over time? And finally, how does the turbocharger affect the engine's responsiveness and throttle lag? I'd appreciate a concise yet comprehensive overview of the disadvantages of a turbocharged engine.