Flagon and Jonty
The difference between pure FMS fitted conventional aircraft and FBW aircraft is mainly the protections soft in case of Boeing and hard in case of Airbus. These were basically designed so that pilot by his act cannot stall or over speed or overbank. But these parameters can get exceeded by environmental factors like angle of attack changing externally or over speed because change in wind and also by the AoA sensors or Pitot/static tubes getting fouled and triggering protections due to inappropriate data. These factors were not originally factored in the design of the aircraft so they have to come out with remedies. Immediate solution is through OEBs. I don't think airbus pilots will have objection to a switch to go into alternate law. It may come in future. Till then we follow manufacturers recommendations of switching two ADRs. EMER ELEC is not recommended so we simply don't do. EMER ELEC will knock out IR2 and IR3 after five minutes for rest of the flight and may have some other complications. Since these are not standard normal/abnormal procedures pilots discussing the event may appear divided or some may be partially incorrect but to take part in it or understand what is being said you need some knowledge of the flight control system.