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.
I do not understand your posts or what you are talking about.
I’m not aware of any nation that is abandoning tanks, none, and Russia and North Korea are increasing production.
“Returning Tank Production to Soviet Era Levels: Russia Will Soon Be Building Over 3000 T-80s and T-90s Per Year”
Military Watch Magazine Editorial Staff
July-2nd-2025
https://militarywatchmagazine.com/article/returning-tank-production-soviet-era-levels-russia-over-3000
“Kim Jong Un calls for mass-producing newest tanks in visit to upgraded factory”
https://www.nknews.org/2025/05/kim-jong-un-calls-for-mass-producing-newest-tanks-in-visit-to-upgraded-factory/