It can get you into trouble in real (high pressure, specifically) hydraulic circuits, since hydraulic pumps/actuators are almost always flow (current) sources i

It can get you into trouble in real (high pressure, specifically) hydraulic circuits, since hydraulic pumps/actuators are almost always flow (current) sources instead of voltage/pressure sources. It's almost a fundamental rule, since liquids are so incompressible. A hydraulic reservoir under a very high pressure will only provide a tiny amount of flow before the pressure drops to zero. The opposite is also true; if the flow out of a pump is blocked then the pressure will immediately climb extremely high and usually break things. Once you get into the weeds with transistors etc you obviously also have to worry a lot more about currents, but with hydraulics it's always about the flow.