The reason for why no CMYK and why no non-destructive editing is that GEGL development took way longer than expected. Now that more and more of the GIMP core is

The reason for why no CMYK and why no non-destructive editing is that GEGL development took way longer than expected. Now that more and more of the GIMP core is converted to GEGL I am confident GIMP will eventually get these features. GIMP is the story of what happens when you wait with new features until "the right solution" is completed. Not that I really blame them since they have very few developers.