The contrast in discoveries made in 'core' physics in the first 25 years of the last centuries compared to this century is quite insane, it was never going to b

The contrast in discoveries made in 'core' physics in the first 25 years of the last centuries compared to this century is quite insane, it was never going to be sustainable. If it did sustain we would be colonising a new galaxy by now. Consider that in 1900 the atom wasn't discovered yet, within around 25 years the basic principles of quantum physics were established, to say nothing about discoveries in cosmology (GR + big bang).