How many bits do I actually need in a precision screwdriver set?

For most phone, laptop and console repairs, the consensus across community threads is that a 30-to-64 bit set covering Phillips, flathead, Torx, security Torx, Pentalobe and Tri-wing handles the vast majority of jobs. Larger 120-plus bit sets add coverage for obscure fasteners but reviewers note that the great majority of those bits rarely get used.