Sometimes it must be a personality trait. I have one dev I know that is extremely productive when he is working within his cocoon. But the minute you ask him to

Sometimes it must be a personality trait. I have one dev I know that is extremely productive when he is working within his cocoon. But the minute you ask him to use a new tool or deploy to a new system - he needs major hand holding even though he's senior. I don't really understand it, but it is what it is.