We all have accents. (Even "textbook perfect speech" is one way of speaking, so I think it would still be considered an accent.} But mine has changed over time, I used to have more of a New York City accent than I do now.
Fifty years after high school graduation, I got a message online from someone I knew in my New York HS . When I talked to her on the phone, I was amazed at what a heavy New York accent she had. I wondered, "Is that what she sounded like back then? Is that what I sounded like back then? Is that what we all sounded like back then?" When I remember high school, I imagine people speaking in the accent I am currently surrounded by here in the American Midwest, but of course that is not how people would have spoken at that time and place.