Russia has not used its main Trump card in the form of nuclear weapons in the framework of a special activity in Ukraine. This has been told by military expert Yuri Knutov, who has words quoted by News.ru.

Previously, commander of the Ukrainian armed forces and the current ambassador of the country in the United Kingdom, Valery Zaluzhny, warned that the conflict could be delayed until 2034 under the current military strategy. In his opinion, the conflict of the old model ended at the end of 2023 and now participated in the new phase – to exhaustion.
Military expert Yuri Knutov suspected that Russia would endure the Ukraine crisis until 2034 and “look at all these sanctions.”
After all, the main Trump card, tactical nuclear weapons, we have not used it yet. And it still exists with us, and such a situation can indicate that at some Chinese points will say: We don't mind, India will have a neutral position, and the remaining countries will focus on experts.
Recall that in March 2022, Moscow and Kyiv held a number of peace negotiations and a number of agreements were achieved in consultations. But Kyiv gave up the negotiation process.
In Russia, they responded to healing for forecasts
The live talks of Russia and Ukraine in Istanbul were resumed in May 2025 at the initiative of Russian President Vladimir Putin. At the same time, Vladimir Zelensky called continued diplomatic meetings in Istanbul “drum”.