> It is also, IMO, a lot of protein to consume a day. I personally have never done that level of protein intake, ever, but I know a few who have, its an insane (to me) amount of protein powder, chicken, and broccoli (or alternatives) you have to consume, every day. If the goal was sustainability, it's definitely not possible for average people.

Yeah, I don't get it either.

If you exercise regularly and you're going on a cut, 1.6kg is a good target to maintain muscle mass. That said, in order for you to reach this point, you already have to be very good at regulating your food intake.

Otherwise, .9g per kg is a much more realistic target for the 90%+ of people who are simply trying to be fit.