Playing Devil's advocate, given how much firepower Russia has, why is it so soft on Ukraine. I mean what is the endgoal for Russia here? Tire out the US/NATO Empire just as US did to Soviets in Afghanistan. I sometimes feel like all these events are orchestrated as Simon Dixon talks about them in his videos.
China and India signalled to Russia that nukes are big no-no.
Reason is simple - using nukes when you can't win a conventional war will degrade them from strategic asset into tactical one and whole nuclear proliferation flies out of the window and everyone will have nukes.
Russia is throwing most of its deployable conventional firepower on Ukraine and whatever robots, KABs, missiles and drones it can manufacture. It is their manufacturing capability which is limited.
Have you seen the Oryx list of destroyed equipment? The defunct Soviet Union produced a shitton of armored vehicles, Russia inherited most of them and they all got burnt in Ukraine.