I'd go so far as to say that critical and valuable are not necessarily the same thing. I'd like to think I'm valuable; I go out of my way to not be critical. In

I'd go so far as to say that critical and valuable are not necessarily the same thing. I'd like to think I'm valuable; I go out of my way to not be critical. Intentional knowledge shares, documentation, mentoring, etc, plus focusing on writing systems that are fault tolerant, means that I could leave and it -should- be a minor hiccup. Heck, almost an entire team left along with me at one point in my career, and the projects we left behind just...kept working, no issues. Doubt that company is actually looking to figure them out so they can extend/support them should something need changing, but that's on them.