Everyday Astronaut: Starbase Factory Tour with Elon Musk
youtube.comIt's so cool to get a tour like this, fascinating stuff.
The part at 13:30 seems to be some really valuable knowledge, when he says: if you are not occasionally adding things back in, it means that you are not eliminating stuff aggressively enough.
Smarter Everyday did a tour of the ULA facilities [0], which is also worth checking out if you like this kind of thing.