Right now we're pretending to not know the difference between old Soviet junk and modern tanks? But please entertain us with your version of why NATO is not sending modern tanks to UA? Perhaps they're too busy playing Dota? Or requests just keep getting lost? Or they can send millions of 155mm shells but logistics to send tanks are just too hard? Or they're secret RU Orcs too?
It's the same old Soviet junk that Russia is planning to win the war with, or better. I still don't know why you're so obsessed with tanks - or only specific brands of tanks - as if that constitutes a worse threat to Russia than e.g. HIMARS, but Russia already lost a shitload of tanks (being captured or destroyed by Ukraine) and can't make anymore, so it doesn't really take a math genius to see where the balance shifting.
Sure let's extend all this effort for a high probability of a worse outcome? Worked so great in Afghanistan and Libya right?
I think you've missed the point. There is no "good" outcome. Let's say Putin takes Ukraine. Then he wants Poland. The whole thing starts over, just much worse.
Right how mobilized Russians with previous combat experience could possibly compare with super mega ultra warrior conscripts of Ukraine and super sober uber special forces of the 8th? mobilization wave of Ukraine?

Not the best of your straw people. I'm talking about the Russian forces.
The 200k invasion army was supposedly better trained and better equipped and had other advantages like robust air support and still functioning supply lines. What happened to those soldiers? No one cares, let's throw another 300k into it, just with less of everything, and see how that works out. Maybe shift some generals around, yeah, that'll do it.