Have you ever done Hatfield squats? What makes you think that you know better than Fred Hatfield and Josh Bryant? Have you set any world records, won any championships, or coached any elite lifters? Hatfield squats will overload the strongest part of the movement, which doesn’t get much stimulus otherwise. And I will do high bar pause squats on top of that (or other similar variation). Leg press and hack squats can be useful but you have to have a reason to do them first of all, and you also have to have access to the machines and I have no machines in my basement.
The other thing I wrote was a joke, or at least sort of. I just don’t see why you would replace a squat with a machine exercise unless you can’t handle more squatting.