Then you haven't spent enough time on /r/ukrainewarvideoreport. There's tons of videos of tanks, artillery and anti-air stuck in the mud, abandoned. It pretty much forces the Russians to stick to the roads, which makes them very vulnerable (they're all lined up and can't escape anywhere because they would get stuck).
Except the Ukrainians didn't bomb them on the roads so how is it a disadvantage if you have the air superiority under control enough that your convoy isn't getting carpet bombed?
Again I invite you to check out the subreddit I mentioned. There's tons of videos of bombed out convoys on the roads. Easily hundreds if not thousands of destroyed vehicles over the last week.
