Yes but my point was, the family didn't
have one name. You were simply the son of someone or the daughter of someone or the husband of someone or the wife of someone or the person who did x profession or if you were really unlucky, the person who was remembered for some particular deed they'd done. People simply knew who everyone else was because everyone lived in relatively small communities.
There are a number of reasons why people might or might not keep their maiden name at marriage these days, not all of which are related to feminism. I know people who kept their maiden name for professional reasons - if your name is on the diplomas as one thing, it's a lot easier to keep that name if you're a scientist or a lawyer or a doctor. You want that parchment to be instantly recognisable as referring to you, now. Noone asks a man to change his name at any time, and while it might have been practical to expect all women to change their names when their names would not have been on any documents except the baptismal and marriage registries, let alone legal documents or diplomas, it isn't always so now. And the only reason that could be a 'feminist' thing is if you disapprove of women having professional degrees that they need diplomas in in which case I am well and truly bowing out of this!
I also know people who have their maiden name because of a particularly strong family pride or a historical tradition in their family - in places like the USA or Australia, there's such a recent migrant history that it's perfectly reasonable that people would come from Europe where the culture is somewhat different (and always has been) with last names.
Yes, there is a 'I want to keep my last name because it is my identity' thing in a certain kind of feminist thinking, but I'm pretty sure that it's not the dominant reason behind most women keeping their name or double barreling it. Double barreling names has tended to be an aristocratic thing (nobility again!) and has to do with the noble families in the lineage both being acknowledged. It pre-dates feminism as we know it by quite a while. Given this history, I think it's cumbersome to do it but I can't see a problem with it. At least then you're acknowledging both sides of your family. As Monica said, we're not in an era where the woman leaves her family to join her husband's extended family and therefore gives up her name for his.
I'm hardly the biggest fan of feminism (particularly the more recent waves of it) myself, but your argument here (particularly in appealing to history) isn't strong. All this said I probably
will take my husband's name, but I'm not likely to be graduating before I get married so the name on the parchment will match

If I was an academic with much published by the time I was getting married though, I would think twice about at least double barrelling my name or continuing to publish under my maiden name.