I have a feeling that it is coming soon. If recent history is a prediction measuring stick for the future, he will die an untimely death.
This Ukraine war is way worse than the debacle in Afghanistan for the Russians and it was certainly a leading contributor to the fall of the Soviet Union.
Ukraine has not just made an amazing transformation in their military, but a transformation in the way future wars will be fought. The only thing that I can think of historically that even remotely compares is the rise of the Third Reich after the devastating loss in WWI. That was an incredible transformation of their military, but it took a lot longer than Ukraine has taken. Pound for pound they have to be the best military in the World.
Ukraine is kicking Russia's ass on the battlefield. It can't be long now.