This. I was wondering how can everything be better in the Ukraine with an actual WAR going on?
OP, there is no such thing as you have to support her for 10 years if you sign the I-864. It's true that divorce does not stop the obligation. Her naturalizing does stop it, though. Or her working for 40 quarters (usually 10 years).
Also, it's not about spousal support (some may have tried to use it as such in divorce proceedings, with varying success), rather supposedly the government making you repay any public benefits she receives (some time ago the government tried this in a few cases, it turned out it cost more to run these cases than the money recovered, so it's not something that realistically happens nowadays, either).
Now I'm not saying it's no big deal to sign the I-864, but I also feel like it's made out to be a bigger deal than it really is, sometimes.