As the Decent brand makes me think tech/integration I would have thought this would have been something they'd consider - maybe further down the track. (I'm sure the competing primary interests of getting their espresso machine out the door with top notch parts is higher on the priority list right now though). For example, Decent Grinder talks to their Decent tablet and inputs that data in to the automatic brew ratio based on your recipe. Result = machine delivers same recipe / ratio time after time.
Perhaps there's a Mazzer factory out there with stock piles of old manual only base units waiting to shift at the right price? Surely not!
Having seen a few arduino based timer projects (some posted on YouTube that help inspire people to convert manual only grinder) I can't help but think surely the option for a timed grind system would't be too much trouble to implement?
But I guess their theory (at least with the grinders they've tested) is that timed is too inaccurate so you might as well just do it manually. Fine at home, but I'm sure commercially every time saving and consistency thing you can implement helps.
I've been interested in this concept for a bit having grinders able to talk to the coffee machine &/or log their data / IoT to TheCloud for reporting / consistency / "we recommend you change the burrs now because you've done 300 kg" type of thing ... Leads me to tangent to read/review the Dalla Corte system further.