I think that is the preference/ideal scenario that Musk has in his head. Take a morning standup with your coworkers about supply chain/scrum, head to the factory floor to show the technicians how to flash the latest firmware to the infotainment system, do some heads down work, go home, eat dinner and then take a phone conference late at night with your Tesla China/Berlin counterpart.

Probably impressions matter on the factory floor and when you scale up operations. You don't want a situation where the people on the factory floor just refer to the design team as "corporate" (i.e. "corporate" wants us to do this, guys we have to redo X over again because "dude in corporate" thinks its not going to work otherwise).

I think this is probably where the motivation comes from. You don't want the people who get their hands dirty viewing the people that make decisions for them as some floating heads somewhere off in the ether. If they dont come around ever that's what's going to happen. It creates resentment, destroys morale, and you have to balance that with the morale impact of making the information workers show their faces often enough.

Given that Tesla have been producing cars where the steering “yoke” literally falls off on the highway after a few miles, I wouldn’t be so sure this hasn’t been implemented already!