The agricultural and technological revolutions changed a lot in our perception of food and we all became more fastidious and delicate (is it good for איסטניס?) - we even have expiration dates on everything edible.
As such, we are not suspected to eat anything off floor or whatever can be found under the mattress or in the diapers drawer or a spoiled sandwich in my son's bag.
Do those trends lead to changes in the Halacha regarding cleaning for Pesach, because most of it is based on that very fear that a person would consume it?
Please feel free to edit my English.