I have noticed that lately, Ukraine is less frequently appearing in the headlines as this war continues. Judging by the latest update from the ISW [1], Russia is still controlling a large swathe of the southeast of the country. It may very well be that the longer this war goes on for, the more likely the US & NATO (who are providing materiel and logistical support to Ukraine) will gradually get more distracted and lose funding and interest. So it may be in Russia's favor to have a multi-year campaign in Ukraine. But can they really sustain it? And are tactical nuclear weapons still on the table? With someone as crazy and power-hungry as Putin, I assume that, sadly, they still are.
[1]: https://www.understandingwar.org/backgrounder/russian-offensive-campaign-assessment-august-30
1) they've "held" the south-east (and donbass etc.) for a while, now
2) nukes were never really on the table, that was just some tedious "russia strong man!" nonsense
3) Sanctions are starting to bite
4) Morale among Russian troops is (allegedly) basically non-existent