All I’m saying is that if they kept some, they could maintain some ambiguity whether they were maintaining them or not, potentially deterring the current invasion. It’s not like Russia has money to spare either, we’re taking them at their word that they have a functioning nuclear arsenal.
With how the current invasion is going, I doubt that they know for certain. But let’s be honest, that uncertainty is the only thing keeping US F-22s out of Moscow’s skies right now.