It's not the armor per se, it's the tactics. Sure, armor has its vulnerabilities. But the idiotic way The Russians are using it only exacerbates those vulnerabilities.
@Hoodat Nope. Armor HAS to appear on a battlefield to be useful,and there is NO getting around the FACT that they are big-ass targets that put out a LOT of heat and noise,and there is no way in hell to disguise them as anything other than what they are.
They were able to maneuver out of artillery and air strikes to a certain degree for decades,but those days are OVER. Everybody that has an army now has smart missiles that cost pennies on the dollar of what armor costs,not to mention no lives risked,that are controlled by technicians controlling them via cameras from safe bunkers that are not even in the same country as the battle that is going on.
Armor is now obsolete for everyone but third world nations trying to protect themselves from their third world neighbors,but once the armor they have no starts to wear out,they will replace it with missiles too,because missiles are a hell of a lot cheaper than a tank,and there is no crew to spend mega-bucks on to train them on how to operate for the 15 minutes of actual combat they will live through.
Armor in first world nations is now nothing more than a rolling crematorium for the crew members.
I strongly suspect that within the next 20 years there will be no more fighter or bomber pilots flying inside the actual aircraft,either. They too,will be piloted by "pilots" hundreds of miles away in concrete bunkers via remote controls.
The USAF IS going to fight this one tooth and nail with the Pentagram,but the days of the USAF as anything more than an air taxi service IS coming to an end thanks to robotics. I SUSPECT there WILL be pilots riding as passengers/pilots in waiting in attack aircraft for a while in case the electronics are jammed by the enemy or go bad for some reason,but that's about it.
The US Navy will probably hold out the longest because they can cruise around in the oceans forever with a deck full of armed fighter/bomber aircraft on call for immediate use in situations nobody has time to write code to cover,but that's about it.