I am reminded of a trip from HKG back to LHR in the mid 1990s on a VS 340- cannot remember but probably a 300? We were all boarded when told by the FC that they had to reset the power on the 'entertainment system' so as to ensure that it was all good for the sector. Power down of COMPLETE a/c and emergency lighting only for two minutes. In other words, they re-booted the whole machine.
I learnt, months later, that when preparing for departure, if the five (?) flight computers did not agree with each other, then you had to reboot the aircraft. Best not to tell the SLF about that before a 14 hour sector with no spare seats at the start of Chinese New Year ...
RAT 5. Nowadays, on corporate purchased tickets, one of the terms for discount = no miles given. Although one can be sure that
someone sitting round the big table gets a few perks.