Where did you get this idea?
Ukrain has only a tiny airforce, no modern air defences, and most heavy military hardware, from artillery to tanks, is cold war vintage.
NATO never supplied it with modern fighter jets and missile systems, if it had, Russian helicopters would not be circling Kiev right now.
"Every Russian general is born with the ambition of driving his tanks to the Atlantic Ocean"
This is not helpfull, Russia has the idea that it should be able to do as it pleasesnl in its sphere of influence, but I never met anyone thinking it stretched to include anything past former eastern block borders.
France may not like that. They're not in NATO. But they have nuclear weapons.
Yes, they are, and have been since NATO was founded. From 1966-2009 they did not participated in the Integrated Military Command Structure, despite remaining fully in the alliance.
They still don't participate in the Nuclear Planning Council, and their troops are not put under permanent UN command in peacetime.
This should be “NATO command” not “UN command”.
So yes, Putin probably is considering this scenario at least in his wet dreams...
And it seems like largest country in Europe (by area), with 200 thousand strong army, tons od most sophisticated NATO weapons and 8 years of combat experience have collpased like a house of cards within 24 hours. Do you think Polish or German army will do any better? Or does Russia have better opinion of these armies? So, yes this is possible now... Thereotically...
And history knows larger miscalculations...