The Articles of Confederation were not amended into the Constitution, they were replaced by the Constitution in a manner that likely violated the Articles. Likewise, the Old Testament leads to Priestly Judaism (with animal sacrifice), not the radically different Rabbinical Judaism.
I think trying to bring these things in parallel with start-up incorporation is inherently difficult. Re-incorporation of start-ups is driven by the needs of mostly the same stackholders as the original incorporation. Most importantly, they are trying to achieve the same purpose as the original incorporation—wealth to founders and/or investors. Changes to foundational governing documents are usually aimed at changed or unanticipated circumstances, where the founders’s original purpose does not address how the problem should be solved.
He does have influence, but I don’t read that as saying things are as bad as they were in the 1950s. He’s pointing out that a lot of the power structure of the Confederacy is still around, to the point that imagining if the Confederates had won is less different from now than many folks ignorant of history believe.
Ta-Nehisi has written very pointedly about DT’s victory, but even then I don’t read him as saying things are the same as 50 years ago. Factually, I don’t see how anyone could claim that. Leading protest in 1950-1960s was literally life threatening. Blessedly, that doesn’t seem to be true in the present.