I am sure theymos will be gone one day like all of us, and it will happen sooner or later, but I am sure he made some backup plan of people who would take over control over domain and forum.
It would be interesting to hear something from him and even his confirmation would be good enough, so maybe team of trusted admins and mods would take over or his kids and people he trusts in real life.
theymos is a brilliant person, he must have made preparations to leave this forum to the right person...
It is undeniable that we will not know how old a person is and making an inheritance is something that must be done by everyone so that the baton of hard work that has been done is not interrupted only by him. good luck theymos.