Russia has not used any ICBMs until now.
They clearly don't mind openly targetting Ukrainian civillians.
They clearly don't care how many Russians die in a 'meat grinder'.
They have plenty of ICBMs. But they witheld them until now. Had they used these in the early stages of the invasion, even with conventional warheads, it would all be over years ago.
Have they simply been using the war to taunt the USA and NATO? I mean, as well as trying to reinvent the old USSR?