Oh you won't, but its important to realise that those effects - the itchy scalp, the tangled hair, etc - are a byproduct of the constant washing with harsh detergents. This is because the shampoo, while cleaning your hair, also gets rid of the natural compounds your hair is producing. In effect, the heavy use of shampoo and conditioner means that you have to use even more shampoo and conditioner! If you stopped using shampoo your scalp would itch but the effect would go away in a week or so as the natural compounds were replaced.
I might try it - if I can put up with the itchy scalp. I don’t recall doing a lot of itching back in the 50s.