I bought a 97 Ford Taurus off a friend for $800 back in 2008. Her dad thought it was on its last legs at 155k miles so he wanted to sell it. I drove it for four years. It was running fine until someone blasted it out in front of my girlfriend’s house and drove off. At the time it had 206k miles. 50k miles for $800 was certainly one of my best purchases.
She was on one of the teams that did if I remember correctly. I believe they split up into three teams and developed algorithms independently from one another. What surprised everyone was when they came back, all three teams had more or less the same image. It’s been a while so I may be wrong on some details. But it wasn’t just her is my point.