Given that fdm has hundreds of different materials and I can accurately reproduce models to within a few hundredths of a millimetre with a cheap replicator clone.

Neither of those points makes any sense.
And that's without factoring in cured resin printing, sls, polyjet and metal printing.

I can't think of any disadvantages of a technology that puts the ability in a the hands of an individual that would previously have required an entire factory floor and a lot of people.