When you're become the most overqualified person on ur team and created so much stuff that only you know how they work or even exists.

And no one else is technical enough to understand it all.

So you develop a feeling that you can't be fired because you can't be easily replaced.

even if you try to do a good documentation, lots of comments, helpful alert-boxes umpteenth introducions and trainings but are still the only one to do the tasks because no one cares about because you are the techie anyway. maybe not unreplaceable but on firing they definetly will have a bad time.

@erroronline1 true... it's a big company so as a whole there are a lot of people that could replace me...

Just never could move to a position that meets my level... Hm...