According to Russian sources, the Russian army has 17,200 tanks of T-55, T-62, T-64, T-72, T-80 in storage in addition to T-90 as of data 3 years ago.
The real mystery to me is how fast the Russian war economy can restore the tanks they have in storage to combat ready status and in what quantity.
More than two thousand Russian T-64: why they are still not in Ukraine (topwar-ru.translate.goog)
Also, it is evident that Russian reservists have changed the situation in Ukraine as large numbers of new troops stiffen the Russian frontline. Ukrainian general staff claims that Russian reservists are now reinforcing all fronts and individual accounts of Ukrainian soldiers, particularly at Kherson Oblast confirm that the tactical environment has changed. The Russians claimed 88,000 new troops in Ukraine, half to combat units two weeks ago.
Also signs that the Russian mobilization infrastructure is preparing for a possible round 2 of partial mobilization.
Ukraine's strategic offensive has stalled since October 4th with very little gains, heavy losses and daily failed attacks. If their losses are similar to the average daily deaths their leaders admitted in the Donbass battles they have already suffered heavy attrition of their assault reserves, including their elite NATO trained 70,000 troops and are riding on the final portion of their capacity.
They might try one last Kherson offensive with what they have left, or another Kreminna offensive to get one last propaganda victory before winter and before the Russian surge seals off the frontline. Eventually Russia will no longer have a vast infantry inferiority to Ukraine.
I see no possibility of Ukraine winning the war now. The best case is that they clear the west bank of the Dnipro river by forcing a Russian withdrawal at Kherson.
Ukrainian victory really depended on Russia giving up the war without performing mobilization. The real question was to analyze whether or not was a critical obstacle for Putin. This was the real question of importance, not the other propaganda. And it turned out not to be the case. I think it is not backed by what they historically did- when facing pressure on the battlefield they did partial mobilization (even used conscripts) for the 2nd Chechen war and Afghanistan. Ukrainian army already mobilized persons up to age 65 months ago.