Often the first implementation is almost an MVP (we have no data on this, let's get some!) and once it's in place it has some inertia. Think of the Dow Jones I

Often the first implementation is almost an MVP (we have no data on this, let's get some!) and once it's in place it has some inertia. Think of the Dow Jones Industrial Average. Nobody would construct a price-weighted index today: it has some really poor properties that are avoided by weighting by market capitalisation instead. But the Dow sails on.