About the Engine anti ice thing on the Airbus: the reason the manufacturer wrote such SOP is that as soon as you turn ONE engine antiice on a MEMO will appear: ENG ANTIICE ON.
Turning only one on would create a trap in making you believe they are both on before takeoff, the phase in which they are really needed.
They privileged the safest solution between two contrasting requirements.
And that is the reason why we should look at the actual switches and not just believe what ECAM says. It surprises me how often people set the parking brake but don’t check the tripple indicator. Even though the parking brake handle is set to ‘on’ and ‘parking brake’ is displayed on ECAM does not mean that the parking brake is actually on and holding pressure. The only way to check that is by looking at the tripple indicator.