In GIMP, where are the layer groups? The nondestructive editing?
These are basic tools to a professional workflow.
And don't get me started on CMYK. You cannot do prepress without CMYK support; GIMP was going to get it Real Soon Now for the past ten years and it's still not there.
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.
If you're doing professional work, you should stump for a professional tool. Otherwise it's like complaining that your family car, though ideal for its purpose, is a load of crap because it can't take pallets.
In GIMP, where are the layer groups? The nondestructive editing?
These are basic tools to a professional workflow.
And don't get me started on CMYK. You cannot do prepress without CMYK support; GIMP was going to get it Real Soon Now for the past ten years and it's still not there.