By nature, soba does not travel well over a period of time but, in the olden days, since there were so many soba restaurants and, hence, the delivery distance was relatively short, soba was the leading delivery food.
もとより蕎麦は長時間の持ち運びに適さない食物であるが、むかしは蕎麦屋の数が多く、出前の範囲も比較的狭かったために、蕎麦は店屋物の代表格だった。