I haven’t seen anything. Hopefully nothing tragic happened. Otherwise, there’s obviously a bit of scope for this, for a single admin to just walk.
I think as communities/instances get to be more of a big deal, we as users should ask for multiple admins and moderators and multiple contact points (eg a mastodon account) so that there are fail safes and clear signals. So, if a single admin walks, there’s someone else with the keys. Or at least if the instance goes dark we have the alternative contact to at least get a signal about what’s happening.