Deleted member 1487
They use slave labor as long as the Nazis are in power or it becomes too problematic to. The goal of the Nazis/Hitler was to copy the US colonization of the US: exterminate the natives and use the slave labor of survivors while colonize the area with your people.Related questions -- how long does the Reich continue to utilize slave labor? How successful is German settlement in the east? Do the quasi-feudal farm and labor policies instituted in the 1930's remain in force long term? What does the continental economy look like as a whole, and how does this impact the world economy?
My (likely poor) guesses -- at least to 1960; by then, Western Ukraine and Poland are mostly German; yes; grisly, and any worldwide economic growth in the subsequent six decades is cut by at least half, making TTL's current day tech and prosperity roughly equivalent to OTL's early 1970's.
https://en.wikipedia.org/wiki/Wehrbauer
https://en.wikipedia.org/wiki/Ural_Mountains_in_Nazi_planning
https://en.wikipedia.org/wiki/Breitspurbahn
I doubt the settlement plans or Ural border were remotely realistic though. Germans don't want to live in the wild east, the most they will do is settle annexed Poland and Czech areas.
Likely they would have to reverse the Generalplan Ost to eventually set up Slavic countries/administrative areas to work the land, because the economy would collapse as Germans don't want to move in and replace dead Slavs in an area where angry partisans were be operating and the weather is not friendly. Probably by the 1950s they will have to work with the Ukrainians to set up a state, same with the Cossacks, and probably too with the Baltic peoples. Surviving Russians might end up getting something of their own as some point, but likely huge parts of the East will be depopulated and returned to nature.
Probably Czech areas and Poland outside the General Government are Germanized by the 1960s, but that's it. So that's just the Reich territories: