Concerned with theoretical possibilities rather than actual use

Usage examples of impracticality.

But some of the stuff showed traces of influences, radiated out from Mingulay and bounced back -- voyages later, decades later -- of fashions from twenty-first-century Earth: silly little details that she recognized from the ship's picture files, such as the drawstring hem and the duffel button, these trivial impracticalities betraying their origins like junk DNA.

He must draw up plans, design and redesign everything down to the smallest detail, build, rebuild, take apart, take down, and put up again, no matter the cost or impracticality of it all.

Apart from complaining about the weather, Sally complained about the impracticality of taking Sammy on a walking holiday and about her sore feet.