Interestingly, a recent LWM article on ffmpeg coming back to Debian touched on the possible implications of Michael stopping work on the project: https://lwn.net/Articles/650816/
"Reinhard asked whether FFmpeg is a one-developer project that would find itself in trouble should Michael stop working on it. "To me, this constitutes a serious bus-factor: Without Michael, (probably) nobody is able to replace him." He went on to suggest, though, that Michael's departure could do a lot to bring an end to the fork."
"Reinhard asked whether FFmpeg is a one-developer project that would find itself in trouble should Michael stop working on it. "To me, this constitutes a serious bus-factor: Without Michael, (probably) nobody is able to replace him." He went on to suggest, though, that Michael's departure could do a lot to bring an end to the fork."