Sliced bread...
I want to preface this by saying I love bread. All kinds. There is no such thing as a sandwich without bread and to not have sandwiches...well, I don't even want to imagine that world.
All that being said, I think, and correct me if I'm wrong, that the expression "this is the best thing since sliced bread" gives sliced bread a little too elevated of a status.
I'm sure people used to be pissed when they had a loaf of bread and had to just yank pieces off. I get it. No "slice" would be even, can't make a proper sandwich, etc. I'm sure that when the first loaf came sliced, people picked up their pitchforks and tried to find the witch or sorcerer that was responsible for such magic.
But now? Does it really measure up? If we cure cancer, are doctors going to be saying "curing cancer is the greatest thing since sliced bread!" When Neil Armstrong told the story of how he walked on the moon is it followed up by..coolest thing since sliced bread. I don't know...just seems a bit lacking in comparison. Even toasted bread might mean more.
It's a debate that will probably rage on now that I'm lighting that fire...I only bring the question not the answer. I AM going to go make a mean sandwich right now though...which, of course, would not be as satisfying or maybe even possible without....well, you know.