Also here it is -- a moment of can-kicking in action, from that thread:
> Hey! I also think Adjustment Layers are really important for GIMP. However, Layer Effects will be simpler to start with since they only affect one layer.
> Hey! I also think Adjustment Layers are really important for GIMP. However, Layer Effects will be simpler to start with since they only affect one layer.
(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. :)