Among my circle of friends, even among academics, the tendency towards changing seems to be fairly high; those who got married late-ish with a significant publication record didn't switch, because it would seriously dilute their name recognition / citation counts / etc., but those who got married in grad school with 2-3 existing publications have all switched. Not entirely sure whether it's tradition or personal reasons or family or what.
Most women like that part of getting married. They get excited about it. They want their kids to have the same last name as both parents and they want to share the name of their husband. Please try to not turn it into some male domination thing, as so many discussions on here needlessly turn to that. It's like the HN version of "all discussions eventually lead to Hitler," or however that goes.
My wife was 18 when we got married. She wasn't "well known". She wasn't a feminist. But she kept her last name and it has never been a problem - except for PayPal.
Our kids have her last name as their middle name and my last name as their last name for convenience - mainly the school's convenience.
Personally I hope some day we go to a system where you turn 18 and pick the name you want. I've known at least two couples where when they got married they didn't choose either name, but took a name for "them". I personally would like to see more of this, but then I'm a bit of a romantic.
o_O
Many early marriages fail (but then again so do many late ones, so that generalism might be based on confirmation bias) but some people are mature enough to have a solid relationship and life plan by that point so getting married early works for them.
I simply wish we didn't feel like we have to excuse women keeping their own name, and hope that one day it will simply be the default.
* and before I'm branded racist for pointing out his nationality without relevance, I'll add that he was the one who made a long case about how things were done properly in his country and how I lacked machismo for allowing this sad state of affairs. There was much wagging of fingers and clucking of tongues about this "American way". Maybe he works for PayPal now.
Not everything is a kind of domination. Especially if it doesn't involve people doing stuff they don't want.