Yup, it's the fact that he's got the confidence to telegraph it which is intriguing... I think a lot of the time they've been happy to let things happen 'under the radar' until the outcomes have become obvious, but I don't think that Zelenskyy would be doing this if they didn't have the resources to actually do something significant.
Zelensky doesn't do feather and fluff Russian propaganda There's an inevitability of Russian collapse, especially given Putin's lack of acknowledgement of failure: Like Trump, is Putin fed information that massages his ego but is far from the truth or does he know but he's too arrogant to consider cessation of war?
That is the tough question because so many people in his inner circle have cashed in on the war. One could argue that the corruption endemic in Putin's rule is the principle architect of the failure of the SMO. There are levels of 'acceptable' corruption but there is a another level where things start to fall apart or the quality and innovation - particularly military hardware development, is lacking to a the degree that the stuff works at 75% efficiency but outcomes fall short.
The difference surplus cash brought with oil and gas revenue kept everything, including corruption and production afloat. Now that surplus is gone - and the current levels of revenue don't even begin to address the increasing black hole.