Reflecting back to it I think I started “exploring personal genomics” in the late 2000s. That’s when direct-to-consumer testing started to become popular, albeit very niche. The book Exploring Personal Genomics is now 5 years old, and a lot has changed since then. In the same year, 2013, David Mittelman and I cowrote Rumors of the death of consumer genomics are greatly exaggerated in Genome Biology.
Now Science has a commentary out, Crowdsourced genealogies and genomes, which reviews how large amounts of public data, genetic and classical genealogical, are being used to change the field before our very eyes. I would recommend though that you read the less edited (longer, more detailed) version on the website of the authors, Crowdsourcing big data research on human history and health: from genealogies to genomes and back again.
This fact from that piece is really illustrative of what’s happening today:
As the number of customers of whole-genome DTC genetic testing just crossed 16 million, it is worth noting that almost two-thirds of them joined since the beginning of 2017 . Based on current rates, this number of customers is predicted to be close to 100 million by end of 2020.