So from what we have seen so far most of the Tanks, APC's are old (30 years) + i bet the nukes they have threatened probably don't even work properly.
I do however fear that Ukraine is not out of the woods yet, he's getting desperate and now using thermobaric weapons and iskander missile (they can use nuclear payload). I do have to question why he's offering the ukrainian civilians safe passage and pulling his troops back, if i have to guess if talks don't go to planned he will probably use artillery of Kiev "if i can't have it no one can attitude". And with sanctions now in place we are on a knife edge of someone (madman) who has nothing else to loose.