Comment by tylergetsay

I think a more common use case might be finding siblings if your adopted, or trying to reengage with your roots if you were say a member of an indian tribe or native hawaiian.

I have a family member who is retired and has taken up geneology as a hobby, she has connected our family history really far back. Not my cup of tea personally but I can see the appeal, its like a treasure hunt. She has traveled to go to old libraries and dig up newspaper archives.