impractical

He notes that the demands were so outlandish that submitting "would have been ruinously expensive and completely impractical."

Restricting the life you live based on income you can earn from working is impractical for most people and impossible for many.

In fact, I think it’s unlikely, and even impractical that such activity would occur.

Brains, artistry, ingenuity — these qualities matter even when they seem impractical and strange.

The defence had argued using the well was "completely impractical".