I didn’t change my name after I got married. We occasionally get mailed addressed to Mr. and Mrs. Lastname but legally my name is as it’s always been. It’s a lot of work to change your name and I’m lazy and I was me for 47 years before I got married so I didn’t really feel the need to change it and the husband didn’t really care whether I did or not.
I have other friends who either didn’t change their name or changed it back after they divorced. You’ve got to do what feels right for you but I don’t think a name change is needed anymore.