Have had everything possible break, multiple times.. Just because a knot held yesterday, or last year, means nothing tomorrow. Cable, wire, copper, leadcore, braid, leader, mono...it all breaks. There are often unseen damages or weaknesses created (during knot tying process) or knicks that occur during regular fishing and you never know until it breaks. I budget about $500 a year in lost tackle, cannonballs, planer boards, dipseys, flashers/flies, plugs, etc. We fish alot though