I honestly don’t think that’s the case. Generational divides aren’t that strongly defined that they have a specific cutoff date and time, people don’t really agree on exact moments. Some people who were born after said cutoff are better described by the previous generation, and vice-versa. For example, if you go strictly by date of birth, by most definitions of the term, my father is a (very late) boomer, but his life experience is much more similar to what defined Gen X’ers.
There’s certainly some interesting stuff to consider there. For instance, my wife and I are less than one year apart, but I have a brother seven years older than me, and she is the first born in her family. We’re both in between, kind of, but I have a lot more Gen X memories and experiences, while she has more Millennial ones.
Funny, my father was born to what was considered pretty old parents, for the time. But grandma in particular really wasn’t very representative of the Silent Generation lol