Once upon a time, Alan Cox alan@lxorguk.ukuu.org.uk said:
The V7 manual doesn't quite agree with you. The sticky bit simply indicates that the code segment for the binary should be kept around in memory/swap (fast storage) not discarded. It might get set on a tiny number of root apps to tune performance.
The only time I remember seeing it set was on /usr/bin/emacs on a Sequent Symmetry (the wonderful world of DYNIX/ptx and choosing your "universe").