And one of the hardest things in software engineering at scale, is organizing and coralling humans and groups of humans, possibly over many years with everyone

And one of the hardest things in software engineering at scale, is organizing and coralling humans and groups of humans, possibly over many years with everyone involved being replaced at some point throughout, to somehow still cooperate enough that the end-product is attainable. Someone like Linus is more of a politician than an engineer, in some ways.