Ukraine ping
Putin is a self-made man who clawed his way to the top and carefully created and customized a sprawling securitate to protect his throne. The idea that he is somehow vulnerable to a coup or mutiny in the same way as Tsar Nicholas II, the dissipated heir to 3 centuries of Romanov rule, seems like a stretch.
However, it has to be said - Luttwak nailed one aspect of the Russian invasion - he said it would be no cakewalk. And for Russia, it has turned out to be expensive in men and equipment. It is also, as of now, a costly campaign with no end in sight.
Thx ZF. Additional: