Can anybody rightfully claim to recondition or refurbish a motor so that it's literally as good as new?
No. All the electrical and mechanical components undergo natural aging, augmented by thermal and mechanical stresses caused by heat, vibration, contamination and torque throughout the previouse operating life of the machine.
A new winding would "start the clock" again, but that won't affect the bearings, and vice versa. Neither replacment will directly affect shaft integrity. Som