Seventy years after the first neutrino detection, the field of neutrino physics is entering the precision era. However, two fundamental issues arise. First, are we truly prepared for precision measurements? Current and future neutrino detectors have very ambitious physics goals, yet some of the dominant neutrino interactions remain poorly constrained. In the first part of this seminar, I will outline the pathways to enhancing the precision of two fundamental interactions critical for ongoing and upcoming studies. Second, as measurements become increasingly precise, tensions among them are beginning to emerge. In the second part of the seminar, I will address the emerging anomaly between cosmological and oscillation constraints on the sum of neutrino masses, reviewing their background and perturbations implications.