Code Review in Android

In early Android, there was not a focus on what I would say was more traditional software culture. There were some unit tests being written but for the most part it was not a test driven culture at all. And that meant that although code reviews are a really good idea and I would encourage everybody to always have their code reviewed, maybe not all of the code was being reviewed all the time in early Android. So they ran a lot more quickly. Like I do think that them running very fast was a key element in Android being relevant at all. Right? Because if Android heads come out a year later, I'm thinking it wouldn't exist right now because maybe somebody else would have come out