I worked a couple of teams that were using Extreme Programming back in the day (early 2000s) and took a lot of lessons from that. Then in the intervening years I worked on teams that didn't have much of a process at all, and when I came back onto teams that were attempting agile, it was in the form of Scrum, and I just... to me it just doesn't click. It's not the agile I was taught, it's just a formula applied without much thought. Usually just a Pivotal Tracker type system + daily standups, going through the motions. I see no point in it.