When someone higher than you "retires" or goes otherwise inactive, yet still retains the power they hold, they inevitably come back. It's guaranteed. Even if it's only for a day. That doesn't sound like a problem at first, but it's a HUGE problem. Why?
Because new policies, rules or ways of handling things get enacted or evolve and those new things don't make sense to them. They haven't been involved with the day to day issues are not familiar with the new challenges the community has been facing. They forget that in community driven sites, the problems are dynamic and evolving. They think the community is exactly the same as when they retired. Only, it's not.
So when they come back they do away with the rules or new policies because "they don't make sense" or they're not needed. It sets the community back, or even destroying the new community all together. Some of the volunteers below them may get frustrated and/or quit because they just witnessed all their hard work get wiped out. Getting undermined by an out-of-touch owner/mod doesn't help the morale for the remaining volunteers.