>>16573
I don't know about ISS, but I've read about work on past Soviet stations, and there were plenty of things they could bring back from station. For example, something like metal details made on experimental zero-g metal casting equipment or results of botanical experiments.

Although amount of this is rarely large, so they could bring everything with crew on rotation. Maybe supply will create demand.

But Roskosmos promised to build Soyuz-based transport ship in 2006, and they still moving dates to future, now it is 2022. They also promised base on moon in 2015. I guess that impotent organization wouldn't do anything.