You are presenting situations that are hard but not impossible to deal with. If you can keep the stuff in RAM, you can also serialize it to disk and then resto

You are presenting situations that are hard but not impossible to deal with. If you can keep the stuff in RAM, you can also serialize it to disk and then restore it from there. The only thing you cannot do is reply to external inputs during that time (so keepalive connections may be a problem if your updates take too long), but that can also be dealt with. We are very far from getting there though.