Originally Posted by
Raymond Wand
If they are obsolete why aren't home insurance companies demanding that these breakers be replaced like they do with knob and tube wire in order to get house insurance?
Because that is not why insurance companies are not insuring homes with knob and tube.
Being "obsolete" typically does not affect the insurability of the house. Being obsolete affects "the cost" of living in and maintaining a house.
Knob and tube, on the other hand, has inherent problems, such as improper extensions, being buried in insulation, having deteriorated insulation, and a myriad of other things which affect "the safety" of the house and its occupants.