As I've ranted before, I believe, creating a cyborg does not give you ironclad job security, regardless of past perception. People feel better when there are parts of a computer system only they understand, but eventually you'll liable to get a manager worth their salt in there and suddenly those parts that used to require you will be replaced by adequate documentation.

And that's where the fallacy lies for so many people. Look, even with adequate docs you'll still know more about what you do than anyone else. Just remember that your goal should be to do your job well, including getting the position ready for your replacement -- whether you end up moving laterally, up, or away -- not making sure that you still have a job no matter what happens. If you're not able to do your job well, well, start looking for another job. You, and everyone down the line, will be happier for it.