That has already happend in the 70ies when the unexplained zoo of hundreds of elemenary particles has been reduced to a handful of more elementary particles (12

That has already happend in the 70ies when the unexplained zoo of hundreds of elemenary particles has been reduced to a handful of more elementary particles (12, called quarsks and leptons) and a set of dynamic theories that use even fewer bosons to describe the interactions between them. This post-copernican model of elementary particle physics is the standard model. Particle physicist have been expecting the next copernican revolution that replaces this model really soon now with the next accelerator upgrade since at least 1980 (look for example for conference talks by Haim Hariri from that time), but fundamental shifts don't happen that often.