The slices strike back

Inevitably, I wasn't the first one to question the greatness of sliced bread
Except, these guys figure its versatility makes it an all time hit.

detective funny proffers an explanation

Also
"It's the greatest thing since sliced bread -- What a brilliant idea! What a fine thing! Said of any innovation more important than a bread slicer. Often used sarcastically. The expression originated in the mid-twentieth century. Chinese checkers, chopped liver, packaged bread, swinging doors, chewing gum, the hula hoop, or the hamburger may replace (the term) 'sliced bread' (in the expression)..." For example, "the greatest thing since the hula hoop."-Random House Dictionary of Popular Proverbs and Sayings”(1996) by Gregory Y."