Guy Dupont on Nostr: I'm working on a talk and would love your opinion if you are a maker of any kind: ...

I'm working on a talk and would love your opinion if you are a maker of any kind:

What is a prototype?

What are your primary concerns when working on a prototype? (especially vs. something going to "production")

Open to any off-the-cuff answers or more official definitions if such things exist.