Productivity will be up considerably and variance will be down. But for the most part you now have machine operators hired rather than machinists and those are to different professions entirely, which rightly have different real wages.
Someone who is capable of cleaning a machine and loading materials and tools as well as unloading product is valued different than someone who actually knows how to make any kind of object that is within reason to be fabricated with lathes, mills and other shoptools, which is what a master machinist is. Those people are rare, they always were rare and historically they were valued as much in the past as they are today. Using them to operate a CNC machine is a complete waste of their skills. Typically those people are making one-offs that CNC jockeys would not be able to due to the difficulty of setting things up and/or the need to get it right the first time because the part is irreplaceable.
Someone who is capable of cleaning a machine and loading materials and tools as well as unloading product is valued different than someone who actually knows how to make any kind of object that is within reason to be fabricated with lathes, mills and other shoptools, which is what a master machinist is. Those people are rare, they always were rare and historically they were valued as much in the past as they are today. Using them to operate a CNC machine is a complete waste of their skills. Typically those people are making one-offs that CNC jockeys would not be able to due to the difficulty of setting things up and/or the need to get it right the first time because the part is irreplaceable.