Not sure what you were trying to say there, not even in regard to the North Korean and Russian push for tanks coming out of their Drone experience in Europe.
Rumsfeld, once said something very profound (he actually said a lot of smart things):
https://minimalistquotes.com/donald-rumsfeld-quote-84205/
We all find ourselves in such a situation.
We did also when the insurgency started and we were not trained, equipped nor structured for such a conflict starting end of 2003 (by Nov it was undeniable).
The Russians are making due with what they have. That is not what is ideal / possible.
They are not going to retool and mass produce some new tank over night. They are stuck with what they have for the foreseeable future and it does OK, if they play it smart. But a T72 (The T90 is a 72 on steroids) is not a great tank.