What is this historical revisionism? There are threads on atlas that had Montana and Iowa flipping, Maine as a borderline lock, and NC with Cunningham as the heavy favorite. I got mocked on here in July 2020 for merely asking the question that Cornyn could win by double digits. (He won by 9.8% by the way)
I'm not sure "historical revisionism" is entirely accurate here - from late 2018 until early 2020 Republicans were considered favored to keep the Senate (although some of us did see potential pathways for Democrats to take control), and it was not until the spring/summer of 2020 that Democrats started to be seen as favored to flip the Senate. Although the final consensus as of Election Day 2020 was that Democrats were favored to flip the Senate, most observers probably didn't expect that kind of consensus earlier in the year.
