Just in time to train an AI model on it and discriminate based on heuristics. /s

IF there was a secure and trustable way that a trusted government could retain DNA information, then I feel like people having a DNA test at birth or on becoming a citizen could be useful, both medically ("your sample indicates you may have a higher risk of dementia") and from a policing standpoint ("we found DNA on this woman's clothes and immediately matched it to this man who hasn't committed a crime before" or "we were able to identify this john doe because their DNA was on record"). However, given that companies and governments are awful, I don't think it could ever actually work in practice :/