Russia’s Tank Plan: Take A 60-Year-Old T-62, Install New Optics, Send It To Ukraine To Get Blown...

Age isn't always bad. How old is the M2? Or the A10?

That is not going to far very well with those Leopard tanks Poland just trained Ukrainian soldiers on and sent to the front last week.

NATO fielded the M60 until 2018, unless Bosnia is still operating the ones we gave them. That Tank was first fielded in 1959. Even the M1 has been around since 1978, so a 45 year old chassis. The Challenger series is the newest of the Tank series out there in NATO and there aren't enough of them to make a difference.
Just as a comparison, the Russians are fielding 3 tanks that are newer than the Challenger, the T80, T90 and T14.
IMO, the lessons from Desert Storm had to be taught again in Ukraine, that being tanks (and helicopters) are just big moveable targets if you don't have control of the battle space. If you look at what is going on now on the Ground, the Russians have adapted their tactics and are advancing under the umbrella of their artillery, missiles and anti-aircraft coverage. It's pretty much how the Soviet Army shaped the battlefield, for you non-cold war types. I expected a breakout when the ground froze, but they may feel that the Ukrainians are rushing into the meatgrinder trying to slow down the broad offense and that they can afford to wait it out while the Ukrainians are fast running out of troops and support in NATO starts getting very expensive and with growing opposition.