On the new A320s when we do a brake check there is no need to call pressure 0 why?
I found an answer here: https://www.pprune.org/tech-log/456530-a320-brake-check.html

The complete fly by wire braking system apparently eliminates the check for residual pressure (check zero) of the older models, probably because the valve that determines which hydraulic pressure reaches the brakes is either no longer present or automatically tested anyway.

The new a320 also has a different PTU design which no longer barks...