It's a mix of a lot of things. Prices. Convenience. Lost of knowlegde about food and cooking. The family split. The mass food production. Marketting and adve

It's a mix of a lot of things. Prices. Convenience. Lost of knowlegde about food and cooking. The family split. The mass food production. Marketting and advertising. Improvment in chemistry. Cultural shift. Mechanization. Offer and demand. Glibalieatio. Demography. Like any complex issue it doesn't have one only cause.