Materials and processes of 3D printers have come a long way.
They used to be called rapid prototyping because that was all they were really good for.
What i was referring to in this reply, are robotic arms that you often see welding cars together.
They do repetitive tasks where the job is exactly the same each time.
We have very poor robot software, and even poorer robot vision.
So, we usually make the world correspond to the robot.
As for example, resistors come on a paper tape much like we used for dot matrix printers. Not as a jumble of parts in a bin.