Nah, industrial and infrastructure should mostly use BSD. And “Never see a command line” consumer OS’s should generally be forks from Linux or other FOSS. Most Linux distros have come a long way and are ready for gaming prime time, but fail the “80 year old grandma who wants to digitise her record collection but is a bit unclear on double-clicking” test.
Yeah, they’re dead and the SU is also dead, take what you can from both and move on.
Trotsky has good points about the nomenklatura and aspects of Permanent Revolution and Transitional Programs are well worth reading. Stalin is obviously more correct but I continue to take Luxemburg’s position on the national question, at least for western orgs (De-colonial movements are obviously a different matter).