I understand, but that was not what I was saying. What I was saying was that Git, with Pull Requests, give a solid foundation for code reviews. It's easier than ever to do code reviews, and there are more code reviews than ever before in my opinion. I review code all the time in my team, and so are my teammates. So while Git and pull requests do not mean necessarily that there was a code review, what I meant was that there were more code reviews than ever. In the Open Source community, I am pretty convinced that most pull requests are code reviewed. Otherwise, the community could not survive.
And as for the article "Why Agile Is Dead: Long Live The Code Review!", I think it's trying to talk about a problem that is not really there. For me, personally, there is no problem with Agile. And there is no problem having code reviews in a Agile environment.
What? Just because the way the author is doing agile doesn't allow code reviews, it is not dead. If you want code reviews, you could even do them constantly: pair programming
Code review is as much a part of ensuring quality as automated testing. Be agile - if your Scrum rules don't let it happen, throw them away.