I worked for the same company for 7 years - similar situation, did way too much and was WAY (my opinion) too valuable. There was much that I did that no one el

I worked for the same company for 7 years - similar situation, did way too much and was WAY (my opinion) too valuable. There was much that I did that no one else could ever do. It reached the point where I couldn't take it anymore so I gave up the golden handcuffs and quit to start my own company. You know what - they didn't miss me at all. There were a couple of "how do we do this" type calls but that was it. However, six months later I was hiring people from the old company. The best decision I ever made was to leave.