I don't think that's a fair characterization. Sprig's business model was somewhat novel. It had limited menu items (like 5 choices), prepared in advance and deployed in a fully loaded truck. Nothing was made-to-order. The truck just drove around from business to business and dropped off three #4s, two #1s, etc. It only served peak meal times.
Honestly I'm not quite sure why the economics were unfavorable. It should have been cheaper and faster than any other kind of delivery food.