It depends on how the world is going to react. If cattle farms shut down, large swathes of land suddenly become available to more efficient food production as the need for farm animal feed decreases.

Huge amounts of food is being processed into animal feed which in turn ends up producing relatively little food. I like my meats as much as the next guy, but in a world hit by a food shortage caused the Russian invasion, using more arable land to feed people instead of cows seems like the obvious choice.