It just might be that one of the best reasons for a power conditioner is the warranty. Some come with an "insurance policy" for what's plugged into it in case of voltage surges, especially due to lightning. A couple years ago, I lost a vintage analog system, HT receiver, TV, PC components, et al, due to a nearby lightning strike. I really wished I had one of those insured conditioners, not because I thought it would have prevented the damage (nothing stops several million volts), but for the payback.