the graph editor ( new & classic) shows the current time.
It would be amazingly helpful, if when the object or animation node you have selected , is connected to a set Driven Key, rather than time, that the time line in the GE showed the driver's value.
even if it's a setting or a button to turn it on and off, that would be super helpful.
or perhaps a quick setting change to show/hide the time line marker
and a quick setting change to show/hide the SDK driver marker.
