Your observation of support crews / Maintenace is important. I've seen some remarks on Twitter about how poorly the RU vehicles have been maintained. They note how the tires have been going flat or falling off and the gaskets have failed from dry rot. And separated from supply chains, they become useless.

A comment on Putin being smart. Sure, maybe he is, but he is only the head of the dragon. It really appears that he, like the former guy, surrounded himself with people who told him what he wanted to hear. Obviously, the strength and skill of this invading army was misrepresented, the opposition discounted, and the will of the world dismissed. There are stories of RU soldiers disabling their own vehicles by punching hole in gas tanks. Looting stores for food. Asking locals where to get gas. Stories that sympathetic individuals in the FSB have been sharing intel with Ukraine. Now I recognize that these reports may be propaganda. But if true, this is bad for Putin. Motivation is on the Ukrainian side not the invaders.

And the west is feeding Ukraine with tons of advanced intel.

Been reading on the role of satellites in this conflict - especially Radar and radio coms. This is something I don't think Putin counted on. He's using tactics that are decades old.

I'm just a geologist and cartographer. But in my opinion, Putin's strategic plan was stupid, failing in both tactics and logistics.