Worth pointing out the deaths of leaders in North Korea certainly have not resulted in a change of mentality.
Different situation. Far smaller land, somewhat kept in check by China and the leaders are bloody awful men, but they don't seem to have Putin's extreme personal interest in spreading conflict.
I've no doubt that Putin's rot will stay for a very long time since it's one of the people he's favoured who will succeed him. But China has a totalitarian state and it's not turned into a massive warmonger despite changes of leader.
You'd have to be really unlucky to get someone as skilful and nasty at the top after Putin dies. Hopefully worst case a military hawk who hopefully won't have a mind like a twisted pretzel. And - the West has had a very strong warning and is going to be strengthening militarily now.
Chin up! you've been a real source of strength here. The world is changing but it will go on.