1) The point of the article is that the Russian logistics is primarily rail-based. Once they are forced to use trucks, they will struggle. Also, the plan was a 2-3 day assault which would not have required a resupply. Now the initial supplies have run out and they are struggling to resupply. A "40 mile convoy" that has not moved substantially in a couple of days is a massive logistics failure.
2) "Driving to Paris" during the cold war was a different time and a different place. And they never attempted it, so you cannot assume it would have been a success.
Their routes into Ukraine in the north and east do not appear to have rail lines for logistics. Note that they have had more success in the south where they likely have a better logistics supply line (more roads, probably better roads, closer to "friendly" territory).
2) "Driving to Paris" during the cold war was a different time and a different place. And they never attempted it, so you cannot assume it would have been a success.
Their routes into Ukraine in the north and east do not appear to have rail lines for logistics. Note that they have had more success in the south where they likely have a better logistics supply line (more roads, probably better roads, closer to "friendly" territory).