Since then it has evolved into a big AI project, will do a Show HN at some point soon.
You slice the hotdog meat lengthwise so it will sit flat, then in half so that you have 4 pieces that fit onto regular sliced bread.
Note that is usually done not because it's a better idea. Driven by either lack of funds, or the idiotic practice where buns come in packs of 8, but hotdogs come in packs of 10.
We'll know humankind has entered a new age of enlightenment & prosperity when we invent cubic sandwiches.