No. Look at the list of countries by the date their constitutions came into being. They don't just replace them for no reason. The oldest is the U.S., followed by Norway and the Netherlands. The list basically goes on to the European and some Latin American democracies, whose constitutions were rejiggered after World War II. Then you get to the former colonial states, then the former communist states, and then to highly troubled states. Finland's constitution came to be only 20 years ago, but that is because it didn't have a unified constitution before that; authority was derived from several documents. The most recently enacted constitution of a developed democracy before that was Spain's, in 1978, which was obviously necessary, given that the country was just emerging from the fascist dictatorship. Then there was Greece, whose constitution in the 1970s came after the end of its own military dictatorship.

Where are you getting this idea that developed countries just "scrap their constitutions and start over every several years"?