Eeek.
I wonder just how many people who attend Mass, where this is (sometimes unknowingly) omitted, think that:
(in my own short form) "I confess that I have sinned exceedingly in thought, word and deed through my fault...ect...and ask the Saints to pray for me"...
Is really "old fashioned?"
Nice "assumption" on the liturgical directors part, doncha think?
Wow.
The real reason: Sin disappeared and Hell was closed in 1968. Or somewhere thereabouts.