Hmm. This seems to focus on a few issues that neatly fall into a sense of "progress" in social change, in which something changes in a number of states culminating in a Supreme Court decision that causes that change to affect the entire country.

However, it ignores some issues that don't fall into such a pattern. For example, the issue of teaching evolution vs. creation in public schools; where teaching about evolution has never been questioned (as far as I know) in some states, while others have had laws on the books, and there is continuing pressure and laws that offer limited "workarounds" of the supreme court decision in order to promote "teaching the controversy", so it's not really a clear cut case of progress.

Another that isn't covered is capital punishment; some states have never had capital punishment, some have repealed it over the years, and the Supreme Court briefly suspended it nationwide but it was reinstated later, and many states still practice it.

Abortion, which is used as an example in this article, faces a similar problems as teaching of evolution. While abortion was allowed nationwide by Roe v. Wade, states are slowly introducing laws that restrict it so heavily that it's not available to a large fraction of people who need it. The turning point nationwide is being slowly turned back by laws that skirt the existing precedent.

It seems like picking these couple of issues, to show how "it may happen again", is a bit disingenuous without also covering major cases in which change hasn't followed this pattern, or has backslid since the original change.