We use this effect ----- low impedance ------ to manage Efield interference into Signal Chains. We view the signal traces between OpAmp stages as being the MIDDLE plate of a 3 plate capacitor. The top plate is the interferer, possible a SwitchReg an inch away or a foot away. The bottom plate is (sum of)the Ground Plane under the signal trace + the output capacitance of the prior stage + the input capacitance of the next stage.
This 3-plate capacitor forms a voltage divider, just like a scope probe does high frequency division with its 2 capacitors.
The various Resistances on the signal trace: Rout of prior stage, Rin of next stage, Rdiscretes from trace to GND or to VDD, combine in parallel to create a HIGH PASS FILTER with the top 2 plates.
All this is modeled, with editable PCB trace (or silicon aluminum layers) dimensions, or even COAX between stages, in the free tool "Signal Chain Explorer" from robustcircuitdesign.com
To enable the Efield interference (or the Hfield interference, the Power Supply trash and the GND plane trash), simply click the "Gargoyles" button at top center, then click "Update" near the topright.
To insert OpAmps into the Signal Chain, look at left margin and click "Amps"; then DoubleClick on your preferred stage; you can edit the gain, the resistors, the Johnson Noise, the lead parasitics, the chip ESD, the Power Supply filtering.