So far as I know, there has never been a US or individual state law or requirement that women change their names when they get married. It certainly doesn't happen automatically or without a lot of effort.
I did go through all the hassle of the name change with my 1st husband because my maiden name was the most common in the US. I didn't revert back to it when we divorced for the same reason, and because by then I was well established both professionally and financially. And to be perfectly honest, it was just too much trouble and I'm lazy.
My 2nd husband's last name is rather common, too, so when we married almost 30 years ago, I kept the name I'd been using for 20 years. When questioned about that, we often joke that he didn't change his name when we got married.
We have had one situation many years ago where even though the airline tickets were purchased together and seats chosen next to each other, the airline in its infinite wisdom and without asking us, tried to split us up at check in to accomodate someone else just because we had different last names. I can't imagine something like that happening these days.