It is also worth pointing out some important aspect related to the family symmetries. As matter of fact, an existence of three identical quark-lepton families could mean that there might exist the truly elementary fermions, preons, being actual carriers of all the Standard Model fundamental quantum numbers involved and composing the observed quarks and leptons at larger distances. Generally, certain regularities in replications of particles may signal about their composite structure. Indeed, just regularities in the spectroscopy of hadrons observed in the nineteen-sixties made it possible to discover the constituent quark structure of hadrons. As to the quarks and leptons, it appears that an idea of their composite structure may distinguish the local chiral S U ( 3 ) F family symmetry among other candidates. Namely, the preon model happens under certain natural conditions to determine a local “metaflavor” S U ( 8 ) M F symmetry as a basic internal symmetry of the physical world at small distances. Being exact for preons, it gets then broken at large distances down to a conventional SU(5) GUT with an extra local family symmetry S U ( 3 ) F and three standard families of composite quarks and leptons.