I don't directly disagree and I feel kind of weird about this too, but the idea that a private company could have been 1) big enough to matter and 2) blocked the head of the government from using the service without literal heads rolling in USSR 40 years ago doesn't match with my understanding of that era.

Actually if Twitter were silently forced to not only carry the president's message but also boost it to everyone's feed and secretly silence his opponents that feels more USSR to me, and feels like almost the opposite of what's happening here.