As the person who said that, I don't 100% disagree - but also, I was just starting to look into non-destructive editing and had no idea of the scope. Since I didn't want to impact the much bigger kicked-can of GIMP 3.0, I thought having some form of NDE would be better than none at all - your "good solution" rather than "perfect solution".
(Also, it's not just non-destructive blur. All the color tools like Color Balance, Hue-Saturation, Levels, Brightness-Contrast, etc are internally GEGL filters and thus are now non-destructive. It's still early but we've already gotten positive feedback from users on how it's improved their workflow, or at least made it "less bad")
The good news is that now that we've worked on NDE, I have much better idea of how adjustment layers could be implemented and hope to implement those (or at least an intermediate step of adjustment layer groups) for 3.0.2. From other people's comments, it seems like that's the next really useful feature to have. :)
