I agree and disagree :)
The living in the now nonsense of newageism is just a baseless scream of yolo. I don't see ' in the now' in that way. The way I look at it is that one would be supremely sensitive (not emotionally) to what IS in the moment, not what they want to be there or imagine to be there. It is not about forgetting (or ignoring) the lessons of the past, but applying them correctly in the moment. If one is not in the moment, their actions in that moment would be insensitive to the requirements of the moment which would create conflicts, violence etc.

Most people I think tend to claim a 'in the moment ' approach but as @dwinblood said, it is willful ignorance. Willful meaning aiming for a result (future) to remain ignorant of something (avoidance of a known - past) This obviously creates an internal conflict and any action born from it will be poor. They do tgus selectively based on their desires or to avoid facing their fears. How can that be the moment?

It is 2am here and I am trying to get ny daughter to sleep longer. Hopefully you understand the ramble :)