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I’m buying an old house that has some knob and tube wiring. Some people have said it is bad news all around. Others have said that I must replace it ASAP. I’ve been told by my home inspector that it should be replaced but an electrician I spoke with said it should be OK right now, as long as the house hasn’t had insulation blown into the exterior walls. Any thoughts on experiences with replacing it now or waiting a while? Thanks for any advice.