I hear asbestos can last forever basically. My house is loaded with it. 120 years old.
Don’t get me wrong: From a durability and performance perspective, asbestos is great. Same thing with PCBs. I’m just afraid that some idiot would buy it, not knowing what asbestos is, and then create a giant mess by releasing fibers when stripping and installing it. It kind of looks like the outer wire braid is actually just woven asbestos, which could be a problem since it is friable and there is no encapsulation.