You can debate the cost effectiveness of the approach, but there was no doubt that by the end of those 6 weeks they were going to be just fine without me.
You can debate the cost effectiveness of the approach, but there was no doubt that by the end of those 6 weeks they were going to be just fine without me.
It's not 'polite' to bring up the 2nd, but it _is_ there. Imagine me/you/him/her doing something wrong and bringing down Prod for X hours. Then imagine your manager telling the director "oh, and btw he submitted his resignation 2 weeks ago, and in confidence he told me he goes to our ABC competitor". That-Looks-BAD, even if it was the most honest of mistakes and even someone else's fault. Once you 'stop playing', don't touch that jenga tower!!
My time wasn't at a zero cost though. But... at a high level, given the size of the company I worked for + the potential impact of getting something wrong, ~6 weeks of my time is pretty close to zero from their perspective. It also probably helps that we had pretty low employe churn.
But from my perspective it did feel like a bit much. Within a couple of weeks I was pretty bored. I was itching to help and do things like you suggested such as documentation, but the team saw doing the work of writing the missing documentation being part of the work of learning what the gaps were so I had to stay away. Ultimately I spent most of my time planning the next phase of my life and hacking on side projects, or hanging out in the common areas with my wife and newborn son when they'd come in.
This 1 month also helped me refresh all my knowledge, go through my notes, etc. "In teaching I learn, and in learning I teach". Having around 100 people asking me questions from all over the 'region' helped me put things back together, see connecting dots that I missed before, and I left there with a new (better) set of notes about myself and how to do things.