It feels as if a lot of this discussion happens between people who have a completely different context in mind where throwing all the prototyping code away may

It feels as if a lot of this discussion happens between people who have a completely different context in mind where throwing all the prototyping code away may make more or less sense. For me, it is hard to think of a scenario of writing prototyping code for more a few days and not reusing at very least 10% of that code (with some modifications). I would be fine throwing away the 90% of it or sth, but the frustration having to rewrite parts that I had just written and threw away would be too much to bear. Even merely for reference, would make no sense for me to throw away.