I can see how improvements can be made in facilitating DNA matches. I discovered my great-grandfather from Australia was adopted and I have hit a brick wall with him. I have written to the Queensland dept. of vital statistics and there is no birth record for anyone with his name, searching 10 years prior and 10 years after his birth. I was told that back then many of the adoptions were by verbal agreement.
Thank you for that detailed and informative explanation. I am very new to the exploration of DNA and still have much to learn.