I always have a player (cd or tape) connected to the empeg.
And this feature (-end of tune- detection) works realy fine!
At the end of my Queen tape (side 1), the last song is still right indexed (correct track#).
I think delayed standby can work with this mode (-end of tune-); and maybe -end of playlist- (end of tape in this case; e.g. 30" of silence).
In the case of radio, -end of tune- could be a mean to shut the empeg when the channel becomes silent (between 2 tunes, speaches, comments or st else...)