> if Russia is advancing 100 meters (300 feet) a day eventually it will reach the Western point of Ukraine unless something changes

Something is changing every day as Russia's annual defence budget's worth of modern arms and training are deployed by Kyiv [1][2].

[1] https://www.cfr.org/article/how-much-aid-has-us-sent-ukraine...

[2] https://en.wikipedia.org/wiki/Military_budget_of_Russia

The man & materials bill they’ve already paid makes that impossible.

This spring will show if they can change the current calculus but if not Russia is going to change the end game.

But Russia is not advancing 100 meters a day. Not even close.

100 meters / days is 3.6 kilometers a year. To reach western point of Ukraine, Russians need to go about 1000 kilometers - so at 100 meters a day it would take them nice 277 years.

Of course, they are going slower than that. And also, at the current rate of attrition, Russia will run out of Russians long, long before that.

100 meters a day is 36.5 kilometers a year. So that's only 27 years.