Yes, that’s exactly that.
The only difference I see is that TimeSpanDragForce allows to change the drag coefficient AND the area for each time-span
This will not be possible with time time-dependent drivers, the area won’t be changeable.
So this will be a regression, but is it that really a problem?
I don’t have any examples right now but don’t worry the change won’t happen soon (it requires a major version) and we will provide examples, at least in the tests.
Now if you think the model should stay it can also be kept. But the logic behind will probably be changed, meaning, instead of building the model with DragSensitive, it will be built with double.
What would you prefer @Emiliano ?