i think their nuke was maintained because US controlled them regularly and I think the US experts were able to distinguish between a fake nuke, a dangerously unmaintained nuke and a functioning nuke.
But that only concerns nuclear warheads. Can Putin send those heads? The latest tests of Satan II suggest that no 😏
They work as job maintainers for the military- handy when it's time to pay mordita, or keep an inconvenient person busy. Now, though, those rotting nuke bases might have plum jobs- sit outside a missile silo and you don't have to be sent to the front.