You can still plug in your car and charge up this fluid at home just as you would with a lithium battery. And the stations where you change fluid can charge it too and put it back into circulation for the next customer. And if demand is larger than that station can charge then a tanker truck can pull up and replenish the underground tanks.
If you find yourself stranded on the side of the road, you simply drain some depleted fluid into a red gas can, hike down the road to the nearest station and exchange it for a gallon of energized fluid.
All the benefits of conventional EVs without the downsides.