I think that the best explanation came from an older colleague some years ago .. and one who would be known to Centaurus in earlier days ..
Said colleague had a million or so hours on large piston (DC3) and turboprop (with some dated military jet) and was in the process of doing his first civil airliner twinjet endorsement ..... ie he was more than used to having to work out what the AH etc was telling him ...
Lad was having a hard time of it, what with flight directors and similar nonsense, and the normally high levels of self-confidence were settling progressively into the depths of the mud and silt .....
THEN ... came the standby power session in the box ...
.... lad came out walking on the clouds ..... "hey, mate, they turned off the winking and blinking lights and the other geezus boxes .... it's just like a REAL aeroplane ..."