What really has made the difference is that they learned from their mistakes in the USSR and focused on salami slicing, or "nudging" as they like to call it now ( and the one DEI dummy said just a week ago about the CHIPs act )

The main differences between the USSR and the US have been
1. the initial prosperity
2. the fact that they were able to slowly get people to commit to changes.

If you look at periods like forced integration, they almost lost everything - because they reached inflection points they couldn't salami slice.