The whole Kursk thing was really perplexing from the start. I do not know if Ukraine was really delusional enough to think they were going to militarily make large inroads into russia or whether it was some misguided attempt to gain a bargaining chip. It's basically turned into a lodestone around their necks though. Ukraine can't abandon the area and cut their losses because it would be a major PR disaster for them. And frankly I think the russians are in no hurry to kick them out. Ukraine stuck having to commit resources to it and effectively opened a second front where russia has the advantage of defensive positioning just manning it with green troops or even NKs while they're able to continue making progress in the east knowing ukraine is having to divert precious resources to kursk. Maybe there's some 4-D chess going on but frankly I'm not seeing it - if russia were actually concerned about it being a bargaining chip they would just dial back their attacks in the east a bit, move to defensive positioning in a couple areas, and divert serious resources to kursk to kick the Ukrainians out in short order.
Can't disagree more. Despite what the headlines seem to read, Russia's gains in Ukraine since Ukraine invaded Kursk in August have been tiny. Warning! All numbers are approximate.
Since Ukraine invaded Kursk in August, Russia has captured about 1,000 square miles of Ukraine. Which is a lot, an area about the size of Rhode Island. But this includes mostly farmland and no cities or towns of significance, and compared to the size of Ukraine itself is a rounding error.
But of note, since August the rate of Russia's advance has been slowing, and
causualties seem to have significantly increased. To be clear, just looking at square miles captured and casualties per month is an incomplete view of a how things are actually going on the battlefield. But we don't have many good proxies, so it will have to do.
Regardless, those are both positive outcomes for Ukraine. Another positive outcome is that Russia is being forced to destroy its own towns and villages in order to recapture them.
Back in August, two primary Russian objectives seemed to be to move into tube artillery range of Kharkiv City and capture the strategic town of Pokrovsk. Neither of those objectives have been accomplished. So the results of the Kursk invasion thus far seem to be: The Russia advance has slowed, Russian casualties have increased, Russia has not achieved strategic objectives, and Ukraine still holds Russian territory as a bargaining chip.