Yet you're fine with handwaving
I'm not; I'm saying it's a question I'll trust to the Ukrainians to evaluate and decide for themselves.
That's something entirely different from what you're suggesting that I said.
[Don't underestimate resilience of dictatorships; the Iran-Iraq war went on for 8 years]
That's actually an argument for why time is more on Ukraine's side.
If Russia gives up after 8 years, or even 10 or 15 -- then Ukraine will have squarely won.