I am not native english so maybe it's just me, but I think the title is misleading because it suggests that Debian could be struggling with a situation where developers would massively drift away (my first reaction was "what ?? is there really a significant amount of devs that are leaving Debian now, and why ?"), while actually it's more a discussion on how to bring awareness to a team and encourage developers to better communicate with colleagues when they have a life change that would lower their commitment (which can happen to anyone, and in any project), so that the project can better handle when a developer "drifts away".