And more than 6 KA-52 denters and been terminally dented in return. And Russia has stopped using them and switched to using MiG-24 instead.
The UA does not have a choice. It must advance now, even without Western airframes. And so far its been successful with the destruction of 3X more vehicles than lost, and daily Russian troop losses at an extreme, while supply lines are being systematically destroyed.
And your source for that data is Ukraine’s MoD.