During the past decades systematic studies of the magnetic moments of the 2 + 1 states in eveneven nuclei have been performed by several groups around the globe, providing valuable tests of theoretical models of nuclear structure.Such measurements have unveiled important features of the interplay between single-particle and collective excitation degrees of freedom.It is widely accepted that the possibility to distinguish between single-particle and collective behavior in nuclear states, thanks to the microscopic description of the states under study, is one of the greatest achievements of the research in nuclear magnetic moments.Experimentally, much progress has been achieved by using the transient field technique in inverse kinematics.However, challenges arise from the difficulty to extend these measurements to 4 + 1 , 2 + 2 , and higher excited states, the use of low intensity radioactive beams, and reactions such as α transfer and fusion-evaporation.In this contribution an overview of the trend of magnetic moments (g factors) for several isotopic chains, measured using the transient field technique, will be presented.The results are evaluated in the context of the systematic of g factors in several mass regions.Some of the challenges and frontiers of future g-factor measurements will be discussed.