Basically yes… every body is different. In the world of implants, specifically ones that rely exactly on how the body reacts to their mere presence, there is no certainty. At the very least, manufacturers can work to produce an encapsulant that is fool-proof… something we have failed to do thus far… which is why we no longer sell our magnets. There are retailers that sell magnets with parylene or silicone coating, and those devices are either marketed with disclaimers that basically state that no implantable magnets are permanent and that they will all fail eventually, or that is the unspoken truth known but not expressed to the customer. We refuse to do that, and demand better of ourselves for our customers’ sake.