Honestly I couldn't disagree more here. Yes they are helpful but in no way do I use them more than my 3D printer now. I think you are right on with the rest of your assessment and need to post process parts. Plus there is no real way to get a mill or lathe for the $350 that a printer costs unless you go to Harbor Freight or something.

As with all things, It is just another tool in the tool chest. For instance If I was making a road wheel, I would print it. If it needed additional cleanup I might true it up on a lathe but at that point I could just chuck it up in a drill.

As far as metal printing, that is a ways off. Don't get sucked into that just quite yet. THe variety of plastics available now are strong and durable.

Perry