A problem which could be seen to be limiting widespread adoption of signed distance fields is the lack of a standard interchange format between applications which would produce and consume them. For example, it would be equivalent to STL/OBJ in the following workflow, but for signed distance fields rather than polygonal meshes:
Thingiverse -----------> Blender -----------> Cura ---------> 3D Printer
(STL/OBJ) (BLEND) (STL/OBJ) (3MF) (GCODE)