We have discussed this during the first couple of months of this war. But actually nobody can predict anything in this war.
For example, my opinion was that the West should do more, like using the NATO air force to help the Ukrainians. A lot of people said that this is nonsense because Putin will go nuclear. I was saying that Putin is not crazy enough to use nuclear arms, and anyway if he is crazy enough, then it is more dangerous for him to lose vs Ukraine, than to lose vs NATO. I believe it would be easier for Putin to "save face" if he says that the "US Air Force beat Russia", than if it comes to "Ukraine beat Russia".
Today, it seems to me I was wrong, and I have changed my opinion. If the Ukrainians win this war by themselves, it will cement their national identity. That's probably the best possible outcome. We still don't know what Putin will do if he loses the war. Probably he doesn't know, either. Perhaps he will do nothing and just send anyone who complains to the gulags, that was the standard KGB playbook!