People talk a lot about metadata collection but not about DNA collection.
It is imperative for any intelligence service to know if any politically exposed person has a child, especially if it spawns from an affair. Logically, we have to assume that all laboratories processing human blood are also doing some sort of DNA genealogy.
Is your idea that NeXT machines had more sharp edges than other computers so would make it easier to collect blood?
Twist on that was the fake immunization campaigns run in Pakistan so as to find relatives of Osama Bin Laden.
Or, just check Strom Thurmond's list of children on Wikipedia.
Last time I went to donate blood, I read all the fine print they asked me to sign, and I was giving them the right to sequence my DNA (!)
The tech taking my blood had no idea; nobody else had ever read it.
I did complain and ask the blood donation org to make sequencing opt-in and my message was "passed on to leadership" but with no followup from "leadership."