Why are there fewer and fewer traditional centers in modern football?

Times are different. There is much more demand for frontcourt players now than before. In addition to scoring goals, we must also participate in the first stage of defense, which requires more control than before. When attacking from their own side, the center players even have to help the midfield control the ball, dispatch the ball in different directions or directly distribute the ball to the wingers who have rushed to the hinterland of the other side. So now the shooting opportunities of center players are less than before, but it doesn't mean that the center's ability is weakened. Today's Ronaldo is an outstanding representative of such players.