Looking at the current territory map, I'm not seeing any significant gains by Russia currently that make up for the months of losses they've endured.

Also, lol, you're nuts if you think a few hundred modern tanks (combined with modern artillery and missiles) aren't just going to completely decimate any land-based offensive by the Russian army. Russia has a serious problem. Either they win it now or they'll never take any territory again once the modern tanks are in play. They know this too.

It's just all over once Ukraine gets F-16's too, because they'll have something Russia never had in enough numbers: Precision munitions.