[spenczar5]

Thanks for explaining more fully, this is helpful.

Yeah, I was trying to say that factories specifically want good road access, so zones aren't necessary for that one exact example - your second paragraph. Sorry for being unclear with the phrase "that stuff," which seems to have sent us in the wrong direction.

You say they may be constructed in residential areas anyway - like, maybe the roads are good enough in a neighborhood. I agree with this, but then I'm not seeing what the problem with the factory is. If it's noisy, impose noise restrictions. If it's polluting, impose pollution restrictions. But I don't have any beef with people making stuff as a matter of course.

My position is mostly that zones are the wrong tool for the job. I wish we were more forgiving of mixed-use neighborhoods. If someone wants to run a 3D printing shop next door to a school, more power to 'em.