They're fungible. Ukraine only has to worry about ammo. Food they will always get from the West. A few pictures of dead babies is all it takes. In fact that might even take care of the ammo problem.
It is a bloody mess there for sure - a tragedy.
I think that Ukraine is bankrupt now. That could be a factor driving a settlement.
Domestic politics in both countries might also shift in a big way from the costs of the war.
Actually we now have the 300 plus bipartisan House vote in favor of helping Ukraine with arms, etc. Any chance the Senate won’t also approve, or that Obama would veto?