> though I assume some of these are made by OEMs They are. The "no, _they're_ the idiots" rivalry between engineer / manufacturing is almost as old as time. A

> though I assume some of these are made by OEMs They are. The "no, _they're_ the idiots" rivalry between engineer / manufacturing is almost as old as time. A design team almost never gets to just "hand off" the files to the manufacturing side without some amount of issue/fix iteration happening. It's not just the physical engineering of a device, though. If the $thing that is responsible for QA/Test or even programming keys into $widget goes down, the factory has to stop and that's _expensive_ so you get the guy that designed it out there to fix it _asap_.