I find it weird that it’s an expectation but I don’t think it’s weird that some women like to do it. My wife wasn’t going to change her name, but decided last minute to take my name because she wanted to share a name with any kids we’d end up having and we both agreed we’d want our kids to have my last name. Now we almost have our daughter (our first) and she has no regrets. But I wouldn’t have been upset if she kept her name. She’s got a far cooler last name than me anyway. Maybe I should’ve taken hers. Oh well.