>>>>>What's so great about sliced bread?
>>>>What is not so great about sliced bread?
>>>
>>>It's nothing special. Anyone who isn't exactly all thumbs can slice bread. I don't see anything epochal in it, to merit the saying "...best thing since sliced bread". So, this is linguistic archaeology, i.e. trying to dig out why do we say so.
>>
>>Perhaps, "This is the best thing to come along since the invention of sliced bread." is a better way to say it.
>
>And as we have found, the importance of it was because it made it easy to use the toaster. Now I'm curious as to why would a toaster be so important. Something wrong with the bread as such but toaster makes it right?

The $ it costs to use the toaster versus toasting in the oven.