It isn't just the unmanned turret aspect which already solves many problems, but also the layered turret. It is more survivable and harder to mission kill than an equivalent that isn't. It is very clever tank design and justifies the generation gap.
On top of this, they corrected for new tank warfare where most tank threats are not sabots but missiles. Even then, the T-14 is at least as survivable and well protected against modern sabots as another MBT in that weight/armour class.
It is however extremely expensive and complex. That's a big drawback but the price to pay for certain capabilities. It's up to the Russians to consider if where they want them and how many. It's like a customised FN SCAR compared to the old reliable AK-47. Different tools for different tasks but having it and having the option is much better than not. Plus it's potentially exportable though I doubt any neutral or Russia friendly nation has it on its shopping list even if it could afford to buy.
The Russians could even do a manned lunar fly by mission with the Proton. Let alone landing a probe on the Moon.
The Soviet Union was the first to land a rover on the Moon with the Lunokhod.