If anyone is interested in how serious Putin’s threats are… The Center for Arms Control and Non-Proliferation states:

France engaged in a slow, but steady build-up of its nuclear arsenal and by 1980, it neared the threshold of what the Soviets considered posing the threat of “unacceptable damage” to the Soviet Union.

Yes, France has reduced its arsenal since the peak of the Cold War, but it is still around the same level as 1980.