I sure hope so. The thing is that the Russians have always depended mostly on ERA to up-armor their tanks. They did it specifically to be able to throw stuff like the T-62 back into battle. (It's a mix of T-55 and T-64 parts that was a budget creation in the 1970's) And at the end of the day a mobile hunk of armor with a gun is a really big problem for the other side. That's why the West fields medium or even light armor vehicles with 105 or 120 mm guns. As long as the enemy needs an anti tank rocket to penetrate it and it can blow out field fortifications it's a really good investment. (Until recently the US Army light infantry used up-armored humvees with wire guided TOW missiles for this role. Just to show how flexible it can be) And Russian armor will always be somewhat up to date as long as the ERA was attached. They just won't be as accurate, fast, or reliable as modern vehicles.

So when they say they're losing 90 tanks a month and replacing 70 tanks a month it doesn't really matter that they're not the newest stuff. And it's having enough of an impact that even with those horrendous losses they're advancing.