I also really like the idea for this product and can see lots of applications of the format/medium beyond leaving employees/handovers.

For example, I am currently transitioning my P&L into a new dept. at a large organisation and the amount of work to onboard into my new manager / team is significant and my weakness in the process is the structure / organisation of my own documentation that allows me to surface the right information to the right people without repeating myself.

Similarly, I've joined new teams (small and large) as a new manager - here you want to quickly get up to speed on lots of projects and how things do/don't join together.

Personally, I would like to describe my situation to the tool about my role and (almost like a user story or 'new manager, existing company' or 'experienced manager, new company) have the tool react to the situation.