While the T-64 is an old tank, the ones Ukraine have have been upgraded several times. And I wouldn't count out their capabilities.

I'm sure the Italians are very capable but they've never demonstrated holding off a tank force 8x their size.

https://www.forbes.com/sites/davidaxe/2022/03/31/ukraines-be...

Whether the Russians can occupy successfully isn't the point, they can do a ton of damage in a short amount of time, not to mention the torture and rape.