This war has at least shown us that ;
Small and light infantry groups equipped with manpads and anti tank weapons were decimating entire enemies columns and supply convoys. (the most important ones) You can't win a war without effective logistics following your armies' advance on the ground.
There is no real change on the ground, the Russians are struggling around Mikolaiv. The front is still stuck in Mariupol (still encircled),Kharkiv or Kiev...