Before WW1, what did the future of Czarist Russia look like?
When looking at Russia in the years before WW1, I see two competing developments. On the one hand, Russia had finally joined the industrial age, and its economy was growing by leaps and bounds. Given its population and geographic size, it looked like it would eventually surpass the rest of Europe.
On the other hand, the early 20th century was also when nationalism had started to take root in eastern Europe. There would have been independence movements growing in the western regions of the Russian empire, and these were some of the most economically productive parts of the empire.
In OTL, the Soviets were able to turn some of these lands into Soviet republics, and install puppet governments in others. However, there was a different dynamic at play. The Soviets forged alliances with communists in these countries, and in some cases allowed the nationalist factions of these countries to suffer much greater losses against the Germans in WW2.
Many would argue that the Soviet government typically favored the interests of Russia over other areas. Nonetheless, they at least tried to present an image of multinationalism, and some powerful Soviet politicians were not Russian, the most obvious example being Stalin.
So, getting back to my original questions, would Czarist Russia have gone on to become a massive economic and military juggernaut, or would it have become an unstable empire, having to constantly deal with independence movements?