The discovery of the fourth quark — the famous November Revolution of 1974 — marked the beginning of large-scale research into charmonia states and charmed particles. Over the past half-century, the charm quark has gone from being an object of research to becoming an important tool for testing QCD predictions. Currently, the study of charm and charmonium physics is being conducted in the BESIII Experiment and takes a prominent place in the experimental programmes of BELLEII, LHCb, and others. Plans for new high-luminosity colliders, known as Super Charm Tau Factories, are being discussed. However, are there still tasks in the domain of tau and charm physics that justify the construction of new accelerators and experimental facilities? This seminar provides an overview of the current state of research and attempts to answer this question.