> it also does not happen both ways. People that can't do that (but maybe can master film coloring post-processing -- I invite you to give a stab at that, if you dare) have enormous respect of the low level tinkerers. The opposite is very often not through.

This feels related to the saying that it’s easier to innovate down the stack than it is to innovate up the stack. It’s far easier for Apple to design and fabricate its own chips than it would be for Intel to make its own consumer OS.