As moving designs between several different CAD/CAM programs using DXF as the standard interchange format is a fundamental and essential part of my workflow, it proved to be too much of a headache to use external format converters (which usually mangle the drawing in the process), and in the end I went back to the more mature vector drawing program I was using before I tried out Affinity. As I'm no longer an Affinity user I don't know what "more foundational" deficiencies you are hinting at, but perhaps if Affinity is at as such a primitive stage of development, it should still be in beta and not a commercial product with version number 1.8.whatever.