I literally stated they would have to fight their way through the mountainous of Azerbaijan while their supply routes would pass through the unstable caucus regions. So yes I have considered that, and it’s also an awful option.

Good look transporting Russians through Dagestan with supplies to then fight with Azerbaijan dug into the mountains.

And their Armenia bases are small and not fully staffed, they couldn’t handle a defense alone and don’t have the ability to feed or support a large force.

Your right about Turkey tho, that is also a big thing preventing Russia from ever acting