everyone has different experiences but I'll take a bone nut any day.....I've never had guitars with cheap plastic nuts but a lot of my former students have and a lot of theirs cracked...if it's good bone I doubt it will crack...that comes down again to people being cheap and not selecting good quality bone to use for their nuts.Bone is not stronger ....because it varies a lot. It's inconsistent. In a perfect world, yes, it may be stronger. The nut's I've had fail have been bone. It splits if it's not the perfect piece.