Comment by empiko

Obviously it can't handle heavy impasto. With heavy impasto, people usually literally sculp the surface using some material to math the rest of the painting and then paint on top of this. Even with minimal impasto, they will often try to mimic the texture by imprinting various tools into the material, mimicking for example brushes used by the original author. This printing method can't do this at all, and the filter might struggle when the painting is too uneven.

Otherwise this might be an interesting technique, if the result can match the color and texture of paint perfectly. I can see it being used for some low priority paintings. There are much more paintinga that need restoration than people with necessary skills, so this could save of them, as it will be more viable to fix them. The infilling is usually just a small part of the entire process, but usually the most difficult wrt how skillful the conservator must be. You must be able to match colors and style perfectly, and there are huge differences in how fast this process is depending on the skills of the painter.