It's interesting for interviews. I assume that people who have somewhat inaccurate memories but with a (possibly subconscious) egotistical filter do much better in interviews than those of us who have more accurate memories of exactly what our contributions to a project were. There are a lot of ways of stretching the truth in your favor, and they all seem much more natural if you really believe them.

My friend recently told me about seeing that an old coworker of hers from 20 years ago described her role as HR manager rather than HR assistant on her LinkedIn. I can easily see how someone with a fallible memory can retroactively exaggerate their title or responsibilities, especially when it's been 20 years.