Makes sense. It seems like there would also be an effect on their military performance. The Finns took the Red Army to school on defensive warfare. Surely the Soviets learned some hard lessons that they were able to use when they were invaded.
The lesson learned from a military perspective were a certainty. I don’t have it in front of me at the moment, but I do know that some of the purged officers that were only sent to gulags instead of killed were actually reinstated as a result of the Winter War.
I wonder where the heart of the Soviet War industry is at this time. I know they took as much of the equipment they could and transported it across the Urals to set up factories there as the Nazis advanced, and also that British aid included machine tools to help them retool, but I wonder how big a project this really ended up being, or more importantly, how much was already there.