@gloomyandy Perhaps you are drawing wrong conclusions from lack of participation of other developers. Some of them modify the firmware for their particular interests, so they just do their own thing and don't care (my speculation).
In any case, mortal users would definitely welcome that kind of adaptive jerk.
Let me try to emphasize. I don't know how to explain my point. Haven't you noticed? Half a world of 3d printing people is talking about things like pressure advance, retraction, flow, speed and acceleration - the key elements to control for a succesfull print. With junction deviation (or something similar) one more advanced mechanism would enable to get rid of defects commonly found everywhere.
Klipper is becoming overwhelmingly popular and is considered the firmware of choice for ambitioned users, but every time I check and compare to RRF I have come to the same conclusion: no reason to switch, and RRF is more polished and reliable.
Until now. Why this adaptive jerk has not been done after years of RRF development... I can't understand. In my naivity, I was even asuming there is some gcode command to tune that, but no.
In my particular case, my prints tend to come out flawlessly, except I get caught by the jerk dilemma. Either low jerk and jerky, stuttering curves with artifacts , or high jerk with smooth, uniform curves but visible ringing around corners. I am constantly changing jerk settings, depending on whether the model has many corners or many curves... Seems not acceptable to me after the underlying factors have been clearly understood. Roughly: Next segment moving in same direction? High jerk! Otherwise: Low jerk! That is not rocket science.
So again, the impact of this feature is not trivial. It is not just "nice to have" but a plain necessity.
Sorry if I my statements are too blunt.
Right now we can see how a certain proprietary printer brand allows itself to treat their clients as slaves, but only because they did many things just right and conquered the market. Open systems, to which Duet3d belongs, can and should perform better.
I said what I said. Let's paint the town red.