You might think that your house was built during a time of quality, and as long as you and the previous owner maintained it you won’t need to worry too much. You might want to know when your house was built, as houses built before 1965 tend to use aluminum wiring due to the shortage of copper at that time.
Aluminum wiring, especially when damaged, is a fire hazard. Yes, it might have done the job for all those years, but no reason to risk things when copper is cheap and available now.
Remember to get a professional to do it for you though!