DNG is recognized by Raw Converters&Editors and allows their utilization of internal linear post-production.
None of those tool allow any other linear type of file, regardless of bit-depth (16.bit .exr, 32bit .exr, 32bit tiff). (Not talking about hack-ways which has plenty of issues).
There is no way to convert .exr or LINEAR .tiff into .dng. There is both 16bit and 32bit. DNG, both are internally linear.
This would be fantastic feature.