YOU obviously don't follow Tesla very closely. When the great grandparent said "Tesla's revolution is a more automated assembly", they were flat wrong which is something Elon himself admitted. Tesla tried to go big on automated assembly and failed.
https://twitter.com/elonmusk/status/984882630947753984
I have watched most all of Sandy's videos; they are orthogonal to assembly automation. The exceptionally impressive things Tesla have done in later revisions of the Model 3/Y (particularly the octovalve and the rear body castings) are related to advanced manufacturing methods which reduce part counts. Not factory automation.
Sandy is very good at styling himself as a premier industry expert—and he's quite likely one of the greatest automotive manufacturing experts on YouTube. But I don't think most serious automotive manufacturing experts are spending much time posting on YouTube...