Indeed, as Willy points out the physical distance is negligible as is the impact on file size. However, the official parts library specifications do state "Every effort must be made to remove overlapping co-planar polygons (line type 3 or 4). Where overlapping polygons are unavoidable, the overlap must be kept to the absolute minimum.".
Having gaps and overlap at all these interfaces causes visual rendering issues. Sure, white dots and lines between surfaces and color-switching surfaces are rendering issues and are not necessarily seen when using the part in a computational build.
Sticking to three decimals would require Edger2, gap-finding, and overlap-finding algorithms to be adjusted. It would also mean that any gap or overlap less than 0.001 LDU is acceptable. Also, any edge line or conditional line would be allowed to be less than 0.001 LDU off target. This means that an edge line can "disappear" someway along its length or not be visible at all because the end points are in front of and/or behind a surface. These rendering issues will make the visual inspection of a part much more laborious.
This is primarily a tool set issue for me. If the tools available in LDPE aren't actually usable, then it makes parts authoring and parts reviewing much more laborious.
Having gaps and overlap at all these interfaces causes visual rendering issues. Sure, white dots and lines between surfaces and color-switching surfaces are rendering issues and are not necessarily seen when using the part in a computational build.
Sticking to three decimals would require Edger2, gap-finding, and overlap-finding algorithms to be adjusted. It would also mean that any gap or overlap less than 0.001 LDU is acceptable. Also, any edge line or conditional line would be allowed to be less than 0.001 LDU off target. This means that an edge line can "disappear" someway along its length or not be visible at all because the end points are in front of and/or behind a surface. These rendering issues will make the visual inspection of a part much more laborious.
This is primarily a tool set issue for me. If the tools available in LDPE aren't actually usable, then it makes parts authoring and parts reviewing much more laborious.