3D printing enables the production of parts that are much closer to scale than those produced by plastic injection moulding.

As several people have described here, there are 3D kits which have overscale parts or lack detail. But this was the norm for plastic kits; for example, most old Skywave plastic parts for weapons and sensors were too large and the gun barrels were far too thick.

There are now so many 1/700 3D-printed kit producers that it is close to impossible to count them all. Quality varies dramatically, from excellent — much better than was possible three or four years ago — to kits that are as bad as, or even worse than, 1970s plastic kits.

It is not possible to generalise about 3D kits. The differences between 3D kits are too significant to make such generalisations.